What is Slippage Fundedfirm is the pivotal execution variance where trades on FundedFirm prop challenges execute at prices offset from the initial quote amid Forex frenzy from NFP bombs, CPI curveballs, PBOC/RBA interventions, or sparse liquidity in Sydney opens and year-end lulls, often 0.8-12 pips divergent—negative slippage sabotaging micro-H4 reversals or grid EAs against 4% daily/9.5% equilibrium drawdowns, positive slippage amplifying OBs on NZDJPY yield chases.