My question is:Do you know how much edge you have?
Yes usually i know.
If you know, how do you calculate it BEFORE starting an attack.
I calculate it not before some attack, but when i train. Say i train on 20 wheels and write on all mine results, then acordingly this data i know which mine edge is. I calculate it as ROI that is most exact way.
Calculating your wins after the attack is nothing of value.
About what attacks you talk ? You must understand all process - say you are runner and run 100 metters and usually you show result from 9.83 till 10.17 . You must understand that theese results are not random if you are good runner you can even before start know which result you can aim, because is some lowest minimum - slower you cant run. Of course can be all stay you started bad and pull the muscle, such can be but , before start you not think about that because that not must be and what is MUST - is that your result will be 10,17 or better.
The same is on roulette , say i play 15 numbers and i know from mine experience how many times i hit from 100. Maximal possible value is all so 100 , are some averidge value and are some minimal value and some mine record to max say minumal is 35 maximal is 72 and averidge is 47.
On diferent wheels theese numbers will be slight diferent, but you must remember - that i not play wheels, on which i not hope to win.
How i detect which wheel to play which no I will not say - that is too much from your side.
Only what i can say is that what edge i have in trainings or in observattions - that number i divide by 5 and that is about what i can expect in real play.
So if in observattions i will calculate acordingly results as +50% - when play it is usually about +10%.
Calculating mine edge before play is not that i need to know for me to play or not, - for that i have other weapons , but simply that is like statistical value what i can expect after 50 spins after 70 spins after 100 spins and so one and if i have some luck and hit many spins which where predicted wrong - I know that no matter to result i must stop to play because if i will stay and will continue mine result can be worse.
All that is decissions duering play and that is big science, here i have very much room to become better, the same like in all other moments.
I am not super player and i think are many, who play much better than me. Pitty but i not meet them .
My point is that you talk a lot about math, but you don't even have the math to calculate exactly your (hypothetical) "advantage".
What you mean - I not have math to calculate exactly mine advantage? This value is not stable, but I still try that always to calculate before play. Really i not calculate but say detect - this table is 7% table - this 15% , this 2%.
Of course not always i am right and i can win on 2% table more than on 20% table
Sometimes is oposite, but many times less often....
Finally I can say, that mine total advantage through last 20 years is about 3%, was periods when i had more , was when less, but that is about if to count all.
If i will have better discipline that number can be minimum 3 times biger, but that is very hard, because i play abroad and after long way if not find good table - play on what can and in such situattions not always positive....