Phidias PropFirm $150,000 Challenge — Position Size Calculator

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Firm Rules Summary

Risk Guide

Unlike traditional prop firms, Phidias PropFirm's $150k account operates without daily loss limits or maximum drawdown restrictions, fundamentally changing your position sizing calculations. You could theoretically lose the entire $150,000 in a single day without violating any firm rules - this is both liberating and extremely dangerous. With no daily loss cap, your risk management becomes entirely self-imposed. At 1% account risk per trade, you're risking $1,500. At 2% risk, that's $3,000. You could take 100 losing trades at 1% risk or 50 at 2% risk before depleting the account, assuming no winning trades offset losses. For EURUSD with a 30-pip stop loss, 1% risk allows approximately 5 standard lots ($1,500 ÷ $300 per lot for 30 pips). On GBPJPY with its higher pip value, a 30-pip stop at 1% risk would be roughly 3.3 standard lots ($1,500 ÷ $450 per lot). Gold with a $15 stop loss at 1% risk equals 10 standard lots ($1,500 ÷ $150 per lot). The absence of drawdown limits means you can withstand significant unrealized losses without violating rules. However, this freedom demands exceptional discipline. Many traders fail spectacularly when given unlimited rope - the account's $420 challenge fee becomes meaningless if you blow the account through oversized positions. Since there are no profit targets either, you can withdraw profits immediately upon passing the 3-day minimum trading period. The challenge and funded phases are essentially identical - no rule changes occur after passing. This creates a unique environment where your success depends entirely on personal risk management rather than navigating firm restrictions. Position sizing should reflect your actual risk tolerance, not what the firm allows, because they allow everything.

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