Eexactly!  One % of the negative bankroll should not be too difficult to calculate.
Place such an amount on say #20 and a similar amount on each on its four squares or corners.
Stop after an overall profit.

One chip at a time per any chosen number (flat betting).
Corresponding streets: Two chips.
Also place two chips at a time on the most frequent street (ahead of all other streets in area 1-36).
Stop the session right after hitting a number and its street.

Write the winning numbers in twelve columns (1-3, 4-6, 7-9, 10-12 and so forth).
The latest two outcomes  in any such street column must one number repeating itself. Bet that number (and its street).

With this simple method I believe that we have probabilities on our side.  I start by betting one chip at a time on the lowest Carré within 1-6, say 1-5.
When one of the other five DS (say 7-12, 13-18, 19-24, 25-30 or 31-36) comes twice in a row, I´ll switch to the lowest Carré there and add one chip to betting (of course I could as well have chosen the highest Carré there). So right after 36, 36 I leave 1-5, and I place two units on Square or corner 31-35. After winning I reduce, go one step Down and take one chip from there. And so forth an so on
                                                                  1-(33/37)^2 versus (30/37) x (31/37).
Testing this metod at "roulette simulator simple"
I returned to betting one chip after 561 spins. At that time I had won 136 chips!

SPLIT EMPIRE 2017

It might be used in 2049 too, you Blade Runners!

I have tried it (flat bet) for fun with some success. It does not require too many notes.
I discovered that (12/37)^2 is almost equal to 1-(35/37)^2. So in two spins the probability of hitting the 3rd Dozen twice is just as probably as hitting split (cheval) 0-1
at least once! This inspired me to SPLIT EMPIRE 2017. At random I chose the lowest split to begin with; and I decided to expand "my empire" right after seeing 25-36 twice in a row. Randomly chosen!.

Say the 3rd Dozen comes twice at first. Then I´ll expand my Empire by adding split 1-4 to betting. Now 0-1 & 1-4 are occupied.
If the two NEXT SPINS both are from the 3rd Dozen, 0-1, 1-4, and 4-7 should be wagered.
And so forth and so on. THE HIGHEST SPLIT I bet, however, is 19-22. I prefer to keep my SPLIT EMPIRE COLLECTED.
In this way I never bet more than eight splits!

Right after winning on two SPLITS (CHEVEAUX) at the same time, I´ll leave only the highest occupied one. Have fun!

Looking at dozen spins or column spins you´ll soon discover than balance might be far away. Only one part may hit the average - and the other two may come MORE AND LESS. From time to time you´ll see Permanenzen in which the less frequent dozen or column appears closer to 1/4 than 1/3 of the spins.

I have had some luck with a method on single numbers. I set a certain goal, say a certain pattern inside each column. After a hit I leave the column. After leaving TWO of the three columns I´ll write the notes from the remaining column in a new piece of paper and start anew with blank spaces in the other columns.  I´ll reach my goal in two of the three columns and reuse the notes from the left column in the following session.

The head line almost says it all. Simply register the streets ( in area 1-36) as they come. In accordance with the table layout.
I bet that exactly two adjacent streets come. Three is a crowd, you know So if 1-3 has come (but not 7-9) simply bet 4-6. If 31-33 has come, I accordingly bet 34-46 and 28-30 (25-27 must be sleeping in this case). Before long the patterns exclude more pairs. This may be the best part: A rather limited bet selection.
More pairs may turn up. My  deadline is at 20 spins, and I prefer to bet flat.

The thirty-fourth hymn of the tenth mandala of the Rig Veda,
a Collection of religious hymns dating back to 4000 BCE,
is known as the gambler´s hymn.
http://en.wikisource.org/wiki/The_Rig_Veda/Mandala_10/Hymn_34

We need a pen and a piece of paper with 6x6 squares reserved for 1-36.
Upper line: 1-6. 2ND line: 7-12. Etc.. Simply fill in the squares as the numbers come.
I have learned the hard way that
SEVEN NUMBERS CAN [smiley]aes/sleep.png[/smiley] TOO LONG.
SO IF ONLY SEVEN NUMBERS ARE MISSING, WE END THE SESSION.

Certain patterns use to appear in a certain order.
In phase A we concentrate on DIAGONALS
If any diagonal can be completed with the NEXT spin, be bet on it:
If 2 has come, we bet 7 (flat bet that is).
If 24 and 34 have come, we wager 29. Etc..

Phase B: If at least five NEXT to each other
ON THE HORIZONTAL OR VERTICAL LEVEL
may come with the NEXT spin, we´ll leave A
and bet on this pattern. Easy examples:
1, 2, 4, 5 have come. We bet 3.
6, 12, 18, 24 have come. We bet 30.

Phase C: When 2x4 squares may be filled in with the NEXT spin,
we only concentrate on this and bet on this.
Phase C ENDS as soon as the pattern is a reality. Examples:11 12
                                                                                       17 18
                                                                                       23 24
                                                                                       29 30
25 26 27 28
31 32 33 34.

Phase D: Have 3x3 squares been filled in? No? So it´s time for D.
If this pattern may come with the NEXT spin, be bet on it.
And after winning we end the session.
But we still remember to stop[smiley]aes/stop.png[/smiley]
if only SEVEN blank spaces are left.
                                                        Good luck!
                                                           Dane

With my new system I seem to end approx. 60% of all sessions with a hit (flat betting Straight Up).
I use a pen and a piece of paper with 12x3 Squares or Spaces reserved for the coming numbers of the three columns.  EACH SESSION ENDS WHEN AT LEAST THREE NUMBERS NEXT TO EACH OTHER IN ANY COLUMN HAVE TURNED UP. For example 1-4-7, 20-23-26-29 or 24-27-30.
I have placed my deadline right after the 120TH spin. And so far I have been able to finish FIVE SESSIONS within 120 spins.

I asked myself how at least three adjacent numbers in any column come. Did 1-4-7 come with 4 filling the gab between 1 and 7?
Or did TWO adjacent numbers there meet one more adjacent numbers in the column?
I then discovered that six times out of ten EXACTLY two adjacent numbers meet exactly one more number.
SO I GET A HIT WHEN EXACTLY THREE ADJACENT NUMBERS IN ANY COLUMN IS A RESULT OF TWO ADJACENT NUMBERS PLUS ONE (not as a result of two isolated numbers being united).
So: If 1 and 4 have come (but not 10) I bet 7.
      If 20 and 23 have come (but not 14 and 29 I bet 17 and 26.
And so forth and so on.
Here is one session:
11
9
24
25
16
1
1
3
30
1
16
7
21...Start betting 18.
12...Add 15 to your betting.
26
15...End of session. See EXACTLY thre numbers Next to each other in the 3RD column: 9-12-15.

The lists (Permanenzen) from SPIELBANK WIESBADEN, year 2011, table 3, are available on the net.
I always start a visit with the first spin of the day. And each day with spins gives me five sessions.
Right after the 41ST day: 681 units won.
Right after the 46TH day: 422 units.
The profit dropping 259 units should not surprise any experienced player.

Right after the 76TH day: 878 units (new record in this test series). The first 76 days of 2011 with five sessions per day: 380 sessions.
878/380 = 2.31.
Good luck!
    Dane

How dare I use the word logic here? I might not always have been logical. But I do believe that there is  some logic in this. Please correct me if I am wrong!
Required for each session: A pen and a piece of paper with 12 X 3 spaces. Reserved for 1-36. Simply fill  in the spaces as the numbers come.
In each column we are able to see groups. It is obvious that a group of two is likely to come first. Side by side. Exactly two adjacent written numbers are more likely to be seen than three. Similarly three numbers side by side in some column should appear  before four. And so forth and so on.

Does this mean that we should expect to see groups of two, three, four, five, six, seven, eight, nine, ten, eleven, and twelve groups IN THIS ORDER?
NO!
Sooner or later a group with more number should come before a smaller group.
When it happens, I win with flat betting. It might happen very soon. If 3 and 9 have come first, I bet 6. Hoping to see the group of 3-6-9 before any group of two appears somewhere within the columns. After winning I end the session.
If two adjacent spaces have been filled in  - not three - we should hope to see FOUR OR MORE numbers side by side in some column.
If groups of two, three, and four numbers have come in that order? Then the next goal should be at least SIX side by side. Not five.
And so forth and so on.
With groups of many numbers it make take too long. I have placed a dead line right after the 120TH spin.
The initial tests (from the first days of 2011, table 3, Spielbank Wiesbaden):
1.  +16.  Five next to each other came before four next to each other.
2.  +34.  Four    -   -    -      -       -         -  -      three  -    -    -      -   .
3.  +35.  Five    -    -   -      -       -          -  -     four    -    -    -      -   .
4.  +13.  Four    -   -   -       -       -          -  -    three   -    -    -      -   . 
                            [smiley]aes/coffee.png[/smiley][smiley]aes/coffee.png[/smiley][smiley]aes/coffee.png[/smiley][smiley]aes/coffee.png[/smiley]
                                                    Dane

Betting some adjacent groups that have occured the same number of times might be boring. But what if the groups next to each other are different?
Street, double street, street and so forth. Then we should not expect the normal "flat" pattern, but rather a zigzag pattern. I find it rater entertaining to watch the zigzag pattern come. Whether it produces a profit is another question.
Whenever two or more groups side by side have come a similar number of times, I bet those groups (flat betting). The groups I bet seem to be "in balance", but of course it is an illusion, as the groups differ in size. After approx. 55 spins I end the session. At that time the zigzag pattern should be visible.
My  adjacent groups:
1-3/4-9/10-12/13-18/19-21/22-27/28-30/31-36.
                                                                      Have fun[smiley]aes/coffee.png[/smiley]
                                                                                  Dane

Mr J´s method "A complete street" has inspired me to this. If we don´t have too many chips, it might be cheaper to work on split instead of single numbers.
Mr J hopes to see a complete street (three numbers) within  the latest 12 spins.
Accordingly I hope to see a complete line (three splits) within  the latest 8 spins.
                                         1-6   = 1-4 & 2-5 & 3-6.
                                         7-12 = 7-10 & 8-11 & 9-12.
                                       13-18 = 13-16 & 14-17 & 15-18.
                                       19-24 = 19-22 & 20-23 & 21-24.
                                       25-30 = 25-28 & 26-29 & 27-30.
                                       31-36 = 31-34 & 32-35 & 33-37.
As far as I can see, it is sufficient to watch the latest SEVEN spins. When exactly two of the three splits from a line are there, I simply bet the missing one.
Without progression.
                                                  Good luck!
                                                     Dane

 In roulette circles Jean le Rond d´Alembert (1717-1783) is associated with "Progression d´Alembert": One step up after losing and one step down after winning. A few examples: -1-2-3+4+3+2 = 3. And 1+1+1-1-2-3 = -3. The player  from the Age of Enlightenment might be balanced. And Red and Black might be in balance. But this balance is not reflected in the last example! 
"Contre d´Alembert" is contrary to progression d´Alembert. One step up after winning and one step down after losing.  I do not think, that this is worth trying on Even Chances.
I rather try it in a flexible way on the known DS: 1.  1-6
                                                                  2.  7-12
                                                                  3. 13-18
                                                                  4. 19-24
                                                                  5. 25-30
                                                                  6. 31-36.
I bet the groups that came IN THE LATEST FOUR SPINS. The average is jut a little bit more than three groups. Within four sessions I once bet only one group.  63 X two DS, 159 X three BS, and 68 X four DS. In average one session lasted appox. 76 spins.
The session ends when I have won on a DS on LEVEL 10. My first four sessions (from the first four days of 2011, table 3, Spielbank Wiesbaden) resulted in 181+87+27+80 = 375.  375 chips or units.
After a [smiley]aes/coffee.png[/smiley] break I´ll show you how  I start one session

The three numbers in a street turn up in some order (repeats are ignored): A is the earliest number, B is the next coming number, and C is the last one. There are only six possibilities:
                                                                        ABC/ACB/BAC/BCA/CAB/CBA
However, there are twelve streets. When one combination comes again, I win (flat betting) and stop. I also end the session, however, instead of betting more than three numbers.
An easy example from the two first streets only:
3 A
1 B
2 C
6 A
4 B
The lowest numbers: 1, 2, 3 are marked with BCA.
A similar pattern may come in street 4-6: I have written  A together with 6 (third column) - and B together with 4 (first column). Now I bet number 5. If I win, I´ll write C in the middle and end the session.
After only 13 sessions (Spielbank Wiesbaden) I have won 107 chips.
                                                                                                                                   Good luck!
                                                                                                                                         Dane

I found this method on roulette-forum.de
If you are able to read German, you may found it here on this German forum:: Topic 16664. Kurt voh Haller
To read and understand the books (in German) from Kurt von Haller (if they are still available) requires much more than a superficial knowledge of probabilities.
Anyway, one of his books inspired TANAGRA to initiate a topic. She waits for the first repeat - and then she bets that number (flat betting). For how long?
She stops after winning - or after exactly 37 spins (including the first spins without betting).
In her ongoing test  (after approx.23,000 spins) she has won approx. 16,000 chips. The test continues!

                                                              Dane
                                                                                 

I have mainly been playing with flat betting. Now I am using a kind of positive progression. The probability that I win (and go one step up) is 0,55555555557.
It is only a question of time, before I´ll reach the next level.  Time is still essential; and if you have the patience to continue after many  [smiley]aes/coffee.png[/smiley]breaks, this might interest you. In my test series I have chosen to end each session after winning with eight units on one number. But feel free to build a bigger ladder!
Four sessions (European roulette, rouletteRUs) resulted in 1082 units
                                                                               131    -
                                                                              -350    -
                                                                                847    -  .
As you can see, the results are very different from each other.
Today I tried the method on some lists from Spielbank Wiesbaden. The session required 270 spins  and ended with -68 units.
LEVEL   UNITS
1      X - 24
1      X - 26
1      X - 24
1      X - 22
1      X - 70 (I got a hir in spite of the negative result).
2      X   33
3      X   25
4      X   33
5      X - 26
4      X - 24
3      X - 47
2      X   27
3      X -  8
2      X   21
3      X - 34
2      X - 26
1      X   35
2      X - 43
1      x     8
2      X     2
3      X     8
4      X - 36
3      X   10
4      X - 32
3      X   23
4      X -  9
3      X   21
4      X -  8
3      X - 14
4      X - 32
3      X   26
4      X - 28 (I got a hit in spite of the negative result)
5      X   35
6      X   23
7      X   32
8      X     0.
.....................................After a [smiley]aes/coffee.png[/smiley] break I´ll tell you more.

                                                           


                                                                               
                                                                             

0.01543209876.  Fascinating result! It´s the result of 5/6 X 4/6 X 3/6 X 2/6 X 1/6.  The probability that DS 1-6, 7-12, 13-18, 19-24, 25-30 and 31-36 all come in six spins (zero is ignored).
In most cases it takes more than ten spins for all six groups to come. So in the beginning of the session I simply bet (flat bet) the latest group.
In many cases I´ll get TWO hits in this way.  As a matter of fact  I hope to get EXACTLY TWO hits, before all  six have come. Right after the two hits I "switch over" and only bet the groups that have not come.  I then leave a group after a hit there.
The session ends if all six groups turn up. It also ends if the latest group comes again (after the initial two hits). As any experienced gambler knows, one DS may skive for a long time.
My first 25 sessions (from the 25 first days of 2010, table 3, Spielbank Wiesbaden) resulted in +40 units.
                                                                                                                                              Good luck!
                                                                                                                                                 Dane

The goal in a block is three numbers next to each other . Diagonally, horizontally or vertically. In  the first block:
1, 2, 3 or 4,5,6 or 7, 8, 9 or 1,4,7 or 2, 5, 8 or 3, 6, 9 or 1, 5, 9 or 3, 5, 7.  If I get a hit, I leave the block. However, I only tolerate FIVE different numbers there. So if five different numbers have come in the block without any hit, I leave it.
The other three blocks are reserved for 10-18, 19-27 and 28-36.
The session ends, when I have left exacly three of the four Blocks.
After just seven sessions (the first seven days of 2010, table 3, Spielbank Wiesbaden): 79 units.
                                                     Good luck!
                                                         Dane

There are still rather few topics on corner/quad/carré/square! I don´t know why.  There are 22 groups; and each of them has two of the four numbers in the second column.
This time I don´t bet before these six wellknown doublestreets have all come: 1-6, 7-12, 13-18, 19-24, 25-39, 31-36.
Then I start betting (flat betting) skiving corners. (the missing quads). If a missing group turns up, I win and leave that group.
The session ends at the latest when all corners or all streets in area 1-36 (1-3, 4-6 etc.) have come.

My first ten sessions (from the first ten days of 2010, table 3, Spielbank Wiesbaden):  +115 units.
                                                                                                                           Dane

If an adjacent street comes, I move in that direction. Moving to another doublestreet is not free: I add one chip when I move.
If I win, I´ll  reduce my betting with one  unit.
I start with one chip on 1-6.   If the adjacent street 7-9 comes, I´ll take one step to the right: Two chips on 4-9.
If 1-3 comes next: One step to the left. Three chips on 1-6.
Obviously this simply method does not require notes.
                                                                                                  Good luck!
                                                                                                         Dane
 

My X0X0X system  on single numbers is a silly system with no basis in logic, math or reason. At least according to TwoCatSam. Nevertheless it has worked for him so far. Now let us try working on streets!  X0X0X  here means that at least three streets have come And as you might have guessed: "0" means that a street has not come. I am simply chasing the X0X0X pattern.  When it comes, I win (flat bet) on a street. An easy examples:  1-3 and 7-9 came.
As long as 4-6 and 10-12 are missing, I bet that 10-12 comes.
With missing parts (streets) as part of the pattern I do not bet too many parts. And I do not have to stop after one hit or develop strange rules in fear of a few missing numbers. As a matter of fact I have extended the system:

12 columns (one for each street in area 1-36).  When a number comes, I write it in the right column. The pattern may come in the first line. And/or among repeaters.  The second line or the seventh line? It does not matter. The pattern repeats! Good luck!

                                                                                                                              0 0
                                                                                                                                  Dane

Flat betting streets in area 1-36.  I start betting on a street when it has come with its highest number (in the third column). If you prefer,  feel free to choose another criterium.   Typically the number of streets with chips is slowly growing.
I stop after exactly two hits in a row.  Good luck!
                                                                                                           

Thanks for the new red and black squares at the top!  Almost like a chess board!    Do you know how chess was introduced according to an old legend? A wise man came with the game to a king asking for a "small" donation: One grain of rice for the  first  square. Two grains of rice for the second square. Four grains for the third square. And so forth. Before long all the rice is in world would have been spent in this way!
This may also explain "Martingale"!!

It is amazing to see the few topics on corner/quad/square/corner here! So I decided to add one. With flat betting. It should not be too complicated. We might even be able to master it without notes.
Start on 1-5. After a loss: Add the next higher corner. In this case: 2-6. After one more loss: Add 4-8 to your betting.  And so forth. But stay within area 1-18 (if you prefer, feel free to choose 19-36  instead).
If you win on only ONE corner: Simply rebet without making any change.
If you win on TWO, THREE OR FOUR corners: Remove from the TWO highest groups you just bet. No more no less.
I  just tried this simple strategy visiting rouletteRUs.com. Within a few hours I had  won 200 units.
Good luck!
                                                    Dane

Once again I stick to flat betting and a grid. Line 1-6: 1-6. Line 2: 7-12. Etc.
When only four numbers out of six have come, there are 15 possible combinations. Probably the four numbers do not form two groups.  Only three combinations form two groups. For example 1&2 and 4&5. 1&2 and 5&6. 2&3 and 5&6. Nevertheless I  bet that four numbers form two such groups (flat betting). 
In the grid we have six horizontal and six vertical group. 3/15 X 12 = 2,4.  In average we should expect  to see the pattern 2,4 times. 2,4 hits
I end the session at the latest  when only seven numbers have not come.