quote If by 1:4 you imply that the TP = 4 x the SL (Van Tharp would call that 4:1) after costs, then you would require a phenomenal entry method to deliver a 75% win rate. By means of contrast, simply using random entries, accomplishing 1:4 RR would imply 1 win for each 4 losses, or a win rate of 20 percent. If you are scalping, then factoring in costs will lower this to ~ 15%. Risking 50 percent of your account means that 2 consecutive losses will lead to destroy. With Excel's binomial formulae, the probability of ruin is therefore 0.999999248562504, or, in other words,...