如何设置卖出价格=买入价格×1.01？量化策略编写求助

我正在编写一套量化交易策略，希望设置卖出价格为买入价格的1.01倍（即1%止盈），例如买入价为50时，卖出价为50×1.01=50.5。以下是我目前的代码：

strategy("test",pyramiding=1, default_qty_type=strategy.percent_of_equity, default_qty_value=100)

rsi = rsi(close,6)  
ilong = input(23, title="period")
isig = input(3, title="signal")

bcwsma(s,l,m) => 
    _s = s
    _l = l
    _m = m
    _bcwsma = (_m*_s+(_l-_m)*nz(_bcwsma[1]))/_l
    _bcwsma

c = close
h = highest(high, ilong)
l = lowest(low,ilong)
RSV = 100*((c-l)/(h-l))
pK = bcwsma(RSV, isig, 1)
pD = bcwsma(pK, isig, 1)
pJ = 3 * pK-2 * pD

[macdLine, signalLine, histLine] = macd(close, 12, 26, 9)

plot(pK, color=orange)
plot(pD, color=lime)
plot(pJ, color=fuchsia)

bgcolor(pJ>pD? green : red, transp=70)

entry_price = strategy.opentrades.entry_price(strategy.opentrades-1)
sell_price = entry_price * 1.01
shortCondition = sell_price
longCondition = crossover(pJ,pD) and macdLine > -0.5

strategy.entry("Buy", strategy.long, when=longCondition)
strategy.close("Buy", when=shortCondition)

问题分析 #

原代码的核心错误在于shortCondition = sell_price：strategy.close的when参数需要接收布尔条件（比如价格是否达到目标价），而不是直接传入价格数值。此外，当没有持仓时，strategy.opentrades-1会返回-1，导致entry_price取到空值，需要做空值处理。

修改后的代码 #

strategy("test",pyramiding=1, default_qty_type=strategy.percent_of_equity, default_qty_value=100)

rsi = rsi(close,6)  
ilong = input(23, title="period")
isig = input(3, title="signal")

bcwsma(s,l,m) => 
    _s = s
    _l = l
    _m = m
    _bcwsma = (_m*_s+(_l-_m)*nz(_bcwsma[1]))/_l
    _bcwsma

c = close
h = highest(high, ilong)
l = lowest(low,ilong)
RSV = 100*((c-l)/(h-l))
pK = bcwsma(RSV, isig, 1)
pD = bcwsma(pK, isig, 1)
pJ = 3 * pK-2 * pD

[macdLine, signalLine, histLine] = macd(close, 12, 26, 9)

plot(pK, color=orange)
plot(pD, color=lime)
plot(pJ, color=fuchsia)

bgcolor(pJ>pD? green : red, transp=70)

// 仅当有持仓时获取入场价，空值用0填充
has_position = strategy.opentrades > 0
entry_price = has_position ? strategy.opentrades.entry_price(strategy.opentrades-1) : 0
sell_price = entry_price * 1.01

// 止盈条件：当前收盘价达到或超过目标卖出价，且有持仓
take_profit_condition = has_position and close >= sell_price
longCondition = crossover(pJ,pD) and macdLine > -0.5

strategy.entry("Buy", strategy.long, when=longCondition)
strategy.close("Buy", when=take_profit_condition)

关键修改说明 #

1. 持仓状态判断：新增has_position变量，判断当前是否有持仓，避免无持仓时获取无效的入场价。
2. 空值处理：用三元运算符给entry_price设置默认值0，防止计算sell_price时出现错误。
3. 止盈条件修正：将take_profit_condition设置为has_position and close >= sell_price，满足布尔条件要求，确保价格达到止盈价时触发卖出。
4. 变量命名优化：把shortCondition改为take_profit_condition，语义更清晰，避免和空头策略混淆。

内容的提问来源于stack exchange，提问作者michael tsai