ta.crossover在pine脚本中不能按预期工作

Question

我有以下脚本

//@version=5
strategy("Bollinger Bands Strategy", overlay=true)
// BB
source = close
length = input.int(20, minval=1)
mult = input.float(2.0, minval=0.001, maxval=50, title="StdDev")
basis = ta.sma(source, length)
dev = mult * ta.stdev(source, length)
upper = basis + dev
lower = basis - dev

// Stoch
periodK = input.int(14, title="%K Length", minval=1)
periodD = input.int(3, title="%D Smoothing", minval=1)
smoothK = input.int(1, title="%K Smoothing", minval=1)
k = ta.sma(ta.stoch(close, high, low, periodK), smoothK)
d = ta.sma(k, periodD)
lcb = input.int(20, title="Long border cross", minval=1) // long condition bollinger
scb = input.int(80, title="Short border cross", minval=1) // short condition bollinger


long_condition = (k[2] < k[1]) and (k[1] < k) and ((k[2] + k[1] + k) / 3) < 20
plotchar(long_condition, "long?", "", location = location.top)
short_condition = (k[2] > k[1]) and (k[1] > k)  and ((k[2] + k[1] + k) / 3) > 80
plotchar(short_condition, "short?", "", location = location.top)
plotchar(source, "source", "", location = location.top)
plotchar(lower, "lower", "", location = location.top)
my_crossunder = (source[1] > upper[1]) and (source < upper) 
plotchar(my_crossunder, "my_crossunder", "", location = location.top)

if (my_crossunder)
    strategy.entry("BBS", strategy.short, stop=upper, oca_name="BollingerBands", oca_type=strategy.oca.cancel, comment="BBS")
else
    strategy.cancel(id="BBS")

由于某些原因，它没有输入我的if条件，而plotchar(my_crossunder, "my_crossunder", "", location = location.top)说变量为真

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在截图这里，它必须输入位置，但它不能，当条件为真时，为什么？

Answer 1

解决了这个问题，strategy.entry()不能用当前策略打开多个、一个以上的位置。所以这意味着我之前的订单是用同样的策略打开的。More info here。所以如果你想下订单，你应该使用strategy.order()