X = Q × (A − T) / (T − P_e)  ·  P_e = P × (1 + fee)

Shares = (E × r%) / |Entry − Stop|

R/R = |TP − Entry| / |Entry − Stop|
Break-even win rate = 1 / (1 + R/R)
Expectancy = W × R/R − (1 − W)

BE_long = (E × (1+f) + 2·fix/Q) / (1 − f)
BE_short = (E × (1−f) − 2·fix/Q) / (1 + f)