1. Look at basic probabilities like if you were running a casino: if your average win is 10% then just to break even you need to win ten times to be able to lose 100% one time. Basically you need to win 90% of the time just to break even. 2. You may be able to hedge by investing upfront into LEAP hedges (calls or puts), if your risk is in a single direction.
If you are basinf the win rate on margin then 10% of margin is terrific- for me the max is about 40%of my total account though I'm told I should trade bigger. http://optionsinvesting.co.uk/trade...tj8ROu_Pp9Ekp185v6VHZHF0x6dlu5k5wCtcTBjnTCyYI