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KAIROCAST
The calculators professional traders and bettors use to size positions and avoid ruin.
Size every trade so a stopped-out loss is exactly the % you choose — the #1 habit of traders who survive.
How much to stake given your edge. Full Kelly is far too aggressive for real life — pros use ¼ Kelly or less.
2,000 simulated futures of your strategy. Change “risk per trade” and watch how fast good strategies still blow up.
Multis look exciting because the odds multiply — but so does the bookmaker's margin. See what you're really buying.
With these probabilities you lose 12.2% of every stake on average. Each extra leg makes this worse.
Tools give mathematical estimates based on the numbers you enter. Your true probabilities are unknown and usually lower than you think.