Phidias PropFirm $100,000 Challenge — Position Size Calculator

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Firm Rules Summary

Risk Guide

Phidias PropFirm's $100,000 account presents an extraordinary challenge with its 0% daily loss limit and 0% max drawdown - meaning you cannot afford to lose even $1 during the evaluation. This isn't your typical prop firm setup where you can risk 1-2% per trade. Here, traditional risk management goes out the window. With a 0% daily loss threshold, a single losing trade of any meaningful size will breach your account. Even risking 0.1% ($100) puts you in violation territory. At 0.5% risk ($500), you're five times over any reasonable interpretation of the rules. The math is stark: zero losing trades are permitted at standard position sizes. For position sizing, you must think in micro-lots and minimal risk. On EURUSD with a 30-pip stop, risking just $100 means approximately 0.03 lots. For GBPUSD with a 50-pip stop, you're looking at 0.02 lots to maintain that same $100 risk. Even these tiny positions could be problematic given the zero-tolerance loss structure. The danger scenario here isn't multiple losing trades - it's any losing trade. A single poorly-timed entry, even with perfect position sizing, could end your challenge immediately. This structure essentially demands either winning streaks from the start or incredibly precise entries with immediate profits. Since there's no profit target specified ($0 target), the exact success criteria remain unclear, but you must generate profits within the minimum 3 trading days without any drawdown. The challenge-to-funded phase transition rules aren't specified, but given the zero-loss tolerance, expect similarly restrictive conditions. Traditional position sizing calculators become nearly useless here. Instead of asking 'how much can I risk,' ask 'how can I profit without any risk.' This might involve scalping strategies, hedging techniques, or waiting for extremely high-probability setups where immediate profit is nearly guaranteed. The $273 challenge fee becomes significant when success requires such precise execution.

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