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Why Backtests Fail Live (3 things beginners underestimate)
経験豊富なトレーダー
の中
Dec 30, 2025 at 06:06
A backtest can look profitable and still fail the moment you go live. Most of the time it’s not the “strategy idea” — it’s the gap between a clean simulation and messy execution + changing market conditions. Here are the three biggest reasons. 1) Costs — the invisible taxBacktests often understate real trading friction. What gets simplified or ignored: spreads (often widen during the worst moments)commissions / feesslippageimperfect fillsIf your edge is small (most are), costs can erase it completely. Practical check Compare gross vs net equity.If net perfo...
Why Backtests Fail Live (3 things beginners underestimate)
新規トレーダー
の中
Dec 30, 2025 at 06:06
A backtest can look profitable and still fail the moment you go live. Most of the time it’s not the “strategy idea” — it’s the gap between a clean simulation and messy execution + changing market conditions. Here are the three biggest reasons. 1) Costs — the invisible taxBacktests often understate real trading friction. What gets simplified or ignored: spreads (often widen during the worst moments)commissions / feesslippageimperfect fillsIf your edge is small (most are), costs can erase it completely. Practical check Compare gross vs net equity.If net perfo...
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