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帖子作者：
OculusQuant
Why Backtests Fail Live (3 things beginners underestimate)
在
经验丰富的交易员
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)
在
新手交易员
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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