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Position Sizing - Calculating Lot Sizes

Jan 11, 2026

Look, if you aren't using a position sizing calculator, you’re basically just gambling and hoping for the best. Most traders blow their prop accounts because they "feel" like a 1.00 lot is right, then the market moves 20 pips against them and they’re down 3% in five minutes. Game over.

My Anti-Blowup Calculator takes the guesswork out of it. It’s the exact tool I use to make sure I’m never risking too much on a single play. You put in your account balance, how much of it you're willing to lose (keep it at 0.5% or 1% if you actually want to pass a challenge), and your stop loss.

Why this is a cheat code:

  • Math over Emotions: It tells you the exact lot size to use so you don't have to think.

  • Drawdown Protection: It keeps you far away from those max daily loss limits that prop firms love to trap you with.

  • Consistency: Every trade carries the same weight. One loss won't wipe out five wins.

If you want to trade for a living, you have to stop "winging it" with your lot sizes. Use the math, stay in the game, and let the RR do the heavy lifting.

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