I Failed 3 FTMO Challenges Before I Fixed My Lot Sizing

My first FTMO challenge lasted four days. Second one, six days. Third — I actually made it to day nine before I blew through the daily loss limit on a single gold trade.

Three challenges. Three failures. That's roughly $700 in challenge fees down the drain. And every single time, the reason was the same: my lots were too big.

Not by a crazy amount either. I wasn't going full degen with 10 lots on a $100k account. I was trading what I thought was "conservative" — 2 or 3 lots on EUR/USD with a 30-pip stop. Seemed reasonable.

It wasn't.

The math I was ignoring

Let me show you what 3 lots on EUR/USD with a 30-pip stop actually means. One pip on EUR/USD at one standard lot is $10. So:

OK, 0.9% doesn't sound terrible. But here's what actually happens on a bad day. You take two losers in a row. That's $1,800. Now you're annoyed, so you take a third trade — maybe you widen the stop to 40 pips because you "want to give it room."

One more bad trade and you're done for the day. Two more and you might be done for the challenge. That's exactly what kept happening to me. I'd have a bad morning, take 4-5 losers, and suddenly I'm at 4.5% daily drawdown with my hands shaking.

What I changed

I dropped my risk to 0.5% per trade. That's it. That's the whole fix.

On a $100k account, 0.5% means $500 max risk per trade. For EUR/USD with a 30-pip stop, that works out to:

Sounds small. Feels small when you're placing the trade. But now I can take ten losing trades in a row and still only be at 5% drawdown. That changes everything psychologically. I stopped revenge trading because losing one trade wasn't an emergency anymore.

The part nobody tells you

Lot sizing isn't about maximizing profit. On a prop firm challenge, it's about surviving long enough for your edge to show up. If your strategy has a 55% win rate with a 1:1.5 R:R, you will make money over 100 trades. But you need to survive 100 trades first.

With 3% risk per trade, a string of 5 losers puts you at 15% drawdown. Challenge over. With 0.5% risk, those same 5 losers cost you 2.5%. You barely feel it. You keep trading. Your edge plays out.

I passed my fourth FTMO challenge in 22 trading days. Profit target hit with only 4.2% max drawdown the entire time. Same strategy. Same pairs. Just smaller lots.

Do the math before every trade

I use a lot size calculator before every single trade now. Not because I can't do the math in my head — I can — but because when I'm in the middle of a session and I'm focused on the chart, I don't want to be doing division. I want the number handed to me so I can focus on execution.

If you're failing challenges, before you change your strategy, before you switch to a new pair, before you buy another course — check your lot sizes. Plug your numbers into the calculator. See what 0.5% risk actually looks like.

It might feel small. But small is what keeps you in the game.