Well i have a rule.
The rule helps get over bad times.
Im only allowed to spend 1% of my bankroll on any given buyin.
All my bankroll is from freerolls
It stands at $700.
Now just worked out $770 - 1% 100 times,even if i lost 100 times i would still have $251.12.
I dont think i will lost 100 times.
Now if i win a 100 times and double my buyin each time my $700 becomes $1893.36.
So 100 losses = -$448.88
100 wins = +$1193.36
I like the maths.