quote In the event 1:4 you mean that the TP = 4 x the SL (Van Tharp would call that 4:1) following costs, then you would require a phenomenal entry system to provide a 75% win rate. By means of comparison, only using random entries, accomplishing 1:4 RR would mean 1 triumph for each four losses, or a win rate of 20 percent. Then factoring in costs would likely lower this to ~ 15%, if you are scalping. Risking 50 percent of your account means that 2 successive losses will cause ruin. Using Excel's binomial formulae, the probability of ruin is therefore 0.999999248562504, or, in other words,...