My first successful 10-10 split against 5 at high TC!

[Planisphere]

So... I was wrong? -_-;

[Freightman]

So... I was wrong? -_-;

Yes you were, if I come close to understanding hi Opt indices. I'll comment using hi lo or halves indices - identical for this play. Flash commented well when he mentioned both Profit maximizing as well Risk averse indices.

For splitting 10's v 5, The index for profit maximizing is true 5. The index for risk averse is true 8. Long term gain for splits at true 5 capture a sliver over 50% of the expected value. Each increase in true count captures a higher percentage of the xoected value. At true 8, a hefty percentage if the expected value is realized.

What this means is as follows:
1. You're going to have a shit load of variance at true 4. Because of the variance, it will have an impact on your max bet by means of reduced spread.
2. Waiting for the risk averse index reduces variance because of the higher expected value to be realized, thus allowing a higher max bet.
3. Though intuitively, splitting at true 4 makes more money, it is actually a falsehood. This is due to the higher max bet realized thru optimal ramping and higher max bet utilizing RA indices.

Last, but not least, splitting below index is dangerous and costly. You got lucky, but one lucky hand does not a bankroll make.