Risk Management Tools
Five calculators that answer one question from five different angles: not "did this trade work," but "can this plan survive enough losing trades in a row to matter."
Most traders find out their position size was too aggressive the same way: a losing streak that should have been survivable instead does real damage to the account. Risk of ruin is the math that tells you, in advance, whether your win rate and your risk per trade can actually coexist with the losing streaks that any trading strategy eventually produces.
The five tools below aren't five separate topics. They're five views of the same question, in the order most traders actually need them: what's my real edge, how bad can a losing streak get, what does that streak do to my account, what should I do about my size before it happens, and how far back do I have to climb if it already has.
Before risk of ruin means anything, you need an honest number for your edge. Trade expectancy turns your win rate and your average winner and loser into a single dollar figure per trade — the number that determines whether trading more is a good idea or a bad one.
Trade Expectancy Calculator →This is the core calculation: given your win rate and how much of your account you risk per trade, what are the theoretical odds of losing your entire account before your edge has time to play out? Small changes in risk per trade move this number by a lot more than most traders expect.
Risk of Ruin Calculator →A 40% win rate doesn't mean you lose 6 out of 10 trades evenly spread out — it means real losing streaks of 5, 6, or 7 trades in a row are statistically normal, not a sign something is broken. This tool shows the real odds of hitting a streak that long.
Losing Streak Probability Calculator →Once you know a losing streak of a given length is realistic, the useful move is deciding in advance how much to cut position size if it starts happening — rather than making that decision emotionally in the middle of the streak itself.
Losing Streak Sizing Calculator →Drawdowns aren't symmetrical — a 20% loss needs a 25% gain just to break even, and a 50% loss needs a 100% gain. This calculator shows exactly what percentage gain a given drawdown actually requires, which is a big part of why avoiding ruin in the first place matters more than recovering from it.
Drawdown Recovery Calculator →None of these numbers is dangerous on its own. A losing streak is normal. A drawdown is recoverable. Risk of ruin sounds abstract until it's tied to your actual win rate and your actual risk per trade. Run them together, in order, and you get a plan that accounts for the losing streak before it happens instead of reacting to it after the account is already smaller.