为何Pine Script带limit限价的市价单仍在下一根K线开盘价入场

问题排查与修复 #

以下是代码中导致限价单未按预期触发的核心问题，以及对应修复方案：

1. 入场条件逻辑错误

你将low < entry_price和entry_condition放在strategy.entry的when参数中同时判断，等于在RSI信号触发的同一根K线就校验价格是否满足条件，违背了「下一根K线挂限价单」的逻辑。Pine Script策略默认当前K线收盘后才确认信号有效性，不需要主动判断价格是否触及限价，系统会自动在后续K线中校验挂单价是否被触发。

2. 平仓10根K线的判断逻辑错误

当前用entry_condition[10]判断入场满10根K线，这个判断是基于信号触发时间，而非实际成交时间，会出现信号触发但未成交就提前平仓的错误，应该用持仓的入场K线索引来计算持仓时间。

3. 策略参数与需求不匹配

需求是2周期RSI下穿10买入、上穿90卖出，但原代码的买入RSI默认值为5、卖出默认值为40，需要调整参数默认值。 #

完整修正代码 #

//@version=4
strategy("2RSI Strategy by Larry Connor", overlay=true)
rsi_length = input(title="RSI Length", defval=2) 
buying_rsi_value = input(title="Buy at RSI Value", defval=10)
selling_rsi_value = input(title="Sell at RSI Value", defval=90)
price = close
rsi = rsi(price, rsi_length)
buy = crossunder(rsi, buying_rsi_value)
sell = crossover(rsi, selling_rsi_value)

date = tostring(dayofmonth) + '-' + tostring(month) + '-' + tostring(year)
disable_date_ranges = input(title="Disable Date Ranges", defval=true)

start_date = input(title="Start Date", type=input.time, defval=timestamp("19 Oct 2020 00:00 +0530"))
end_date = input(title="End Date", type=input.time, defval=timestamp("18 Oct 2021 00:00 +0530"))
in_date_range = time >= start_date and time < end_date
    
ema_len = input(200, minval=1, title="EMA Length")
ema_src = input(close, title="EMA Source")
ema_200 = ema(ema_src, ema_len)

entry_condition= buy and ema_200 < price 

// 修正持仓10K平仓逻辑
pos_open_bar = strategy.opentrades.entry_bar_index(0)
hold_10_bar = bar_index - pos_open_bar >= 10
exit_condition = sell or (strategy.opentrades > 0 and hold_10_bar)

previous_day_close = close[1]
two_percent_of_prev_day_close = previous_day_close * 0.02
entry_price = previous_day_close - two_percent_of_prev_day_close

capital_invested = input(title="Invested capital", defval=100000)
initial_capital = strategy.initial_capital
capital_to_be_invested = capital_invested
if(na(capital_invested) or capital_invested == 0)
    capital_to_be_invested = initial_capital

// 修正入场条件，移除多余的low判断
if (not na(rsi) and (in_date_range or disable_date_ranges))
    strategy.entry("buy", when=entry_condition, limit=entry_price, long= true, qty = capital_to_be_invested/entry_price, comment="Long")
        
if (exit_condition)
    strategy.close("buy", true)

内容的提问来源于stack exchange，提问作者Abhishek