Quote from Buy1Sell2:
Quick exercise: What percentage of winners do you need to have with a 3 to 1 system and a 4 to 1 system to be profitable?Let's assume for the example a commission of $25 (.5 pt) round turn. For the example, let's use 6 pt target and 2 pt loss on the 3 to 1 and 8 pt target with 2 pt stop on the 4 to 1.
6X($50) - ($50)*2(1-X) -$25 = 0
$300X -$100 -$100X - $25 = 0
$400X - $125 = 0
X = $125/$400
X = .3125
8X($50) - ($50)*2(1-X) - $25 = 0
$400x - $100 +$100X - $25 = 0
$500X = $125
X = $125/$500
X = .25
So, breakeven for a 3X system is 31.25% winners. Breakeven for a 4X is 25%.

