New to the jargon? Hover for plain words:LeverageLeverage杠杆借来的钱放大交易。赚了放大赚,亏了放大亏,还可能直接爆仓。🍎 杠杆是放大镜:能把收益放大,也能把亏损放大到烧掉本金。Want to dig deeper? /glossaryStop lossStop loss止损提前定好『亏到这就认输离场』的价格,防止越亏越多。🍎 过河前先约定:水到膝盖就回头,绝不让水没过头顶。Want to dig deeper? /glossarySpreadSpread点差买价和卖价之间的差价,是你一进场就付的『过路费』。🍎 换外币时银行买入价和卖出价之间的差额——不管涨跌,这笔费先收了。Want to dig deeper? /glossarySlippageSlippage滑点你看到的价格和你实际成交的价格之间的差距。行情越快,差距越大。🍎 网购看到的价格和下单结算价不一样:结账时可能多收一点。Want to dig deeper? /glossaryCommissionCommission手续费每次交易付给平台/券商的钱。高频交易里这是最大的隐形杀手。🍎 每次进出市场都过收费站,走得越勤,过路费越可观。Want to dig deeper? /glossaryOverfittingOverfitting过拟合策略把历史行情的『噪音』也背下来了,看起来完美,一换行情就露馅。🍎 背答案背得一字不差,但题目稍一变化就不会做了。Want to dig deeper? /glossaryBacktestBacktest回测Replay the strategy on past market data as if you had traded it back then — and see whether it would have made money.🍎 Like taking an essay you already wrote and testing it against past exam papers to see what score it earns.Want to dig deeper? /glossary