well, since you asked...my experience is different. depends on your approach and, once again, whether or not you get the fill.
Theoretical at the moment i was just using that as an example to clarify my thought and question. i begin foreward testing today. 80% is what i'm hoping for from some past results iv'e had trading a modified version of this strategy. realistically i will find out but the percentage looks like it will be high after modifing the profit. only time will tell but i appreciate all the responses so far. i fell into the trap of trying to adjust my strategy around risk/reward i misunderstood and couldn't make it work. now that i threw that all out the window and re-thought how to build risk/reward into my strategy it seems i finally have what i have been after. i just wanted to make sure my instincts were right and needed some advice...much appreciated so far.
No. In fact, it's even theoretically impossible. 50% win rate with 2:1 is an excellent goal and realistic. (And I once had a 5 year period with 71% winners. I've since come to recognize that as a "hot streak" rather than my ability.)