This is how an EC bet normally behaves in 1000 spins, if we see the number of hits in last 20 spins.

From this, we should learn how to best utilize the statistical concept of

Regression towards mean to avoid the worst attack of variance.

These are the pre-requisites:

1. Let the number of hits in the last 20 spins go to 5 or lesser. It is an alert for you to bet further;

2. Let it improve to 7-8 in the next 20 spins or therafter without any clumping wins of more than 2 wins coming in a streak.

This is your trigger to start betting.

3. Pause in cases where again hit rate goes below 7 in the last 20 spins or in cases of three successive losses, in your bet.

In cases of pause, let the condition No.2 come again to resume, if successive wins streak pushes the hit rate above 7, abandon that

alert and look for another.

4. Still bet cautiously as nothing eliminates bad stretches fully.

5. Use a mild negative progression that can get a net win in lesser wins than losses.

6. If you still get 6 more losses than wins in your attempt, abandon the trigger.

You can see in the given graph that hit rate that goes down to upto 3/20, always corrects to 10/20 or even better. Now, it is upto you as to how you benefit from this statistical and universal truth to avoid the worst attacks of variance and play in a safer zone.