A positive edge does not protect you from a bad run. This is the chance the bad run takes the account before the edge arrives.
Most blown accounts had a real edge and too much size. Risk of ruin is the number that connects the two, and it moves violently with risk per trade — halving your risk does far more than doubling your win rate.
Enter your win rate and reward-to-risk.
Set the risk you take per trade.
Choose the drawdown you would call ruin.
Compare it against half and double the risk.
Short, practical answers. Trade-offs explained, no advice framing.
Shares from account size, risk percent and stop distance, so the loss is decided before the entry.
R-multiples from entry, stop and target, plus the win rate each ratio needs to break even.
What a steady return does to an account over years, with or without monthly deposits.