如何实施超级趋势跨界

Question

我是Pine脚本的新手。我正在尝试以低于条件的方式创建策略。

• 如果当前价格大于超趋势（5,1），并且当前价格大于20 EMA，则“购买”
• 如果当前价格小于超趋势（5,1），并且当前价格小于20 EMA，则“卖出”。

为了避免连续买卖信号，我在链接我如何停止多个购买/出售信号连续打印？ （Pine，Pine，Script，Trading，View，Pinescript，TradingView）

现在信号无法正常工作。一旦购买信号逆转，我就不会收到卖出信号（反之亦然）。下面是我的代码，

//@version=5

indicator('EMA 1 min', shorttitle='EMA 1 min', overlay=true)
ema = ta.ema(close, 20)
[supertrend,direction] = ta.supertrend(5,1)
// Base condition
longentry = (close > supertrend) and (close > ema)
shortentry = (close < supertrend) and (close < ema)


// we create a variable that "saves" and doesn't calc on each bar 
var pos = 0

// we save it to a new number when long happens. Long can be 1 
if longentry and pos <= 0
    pos := 1
// we save it again when short happens. Short can be -1 
if shortentry and pos >= 0 
    pos := -1

// here we check if we have a newly detected change from another number to our pos number this bar
// Is pos equal to 1 and was it not equal to 1 one bar ago
longsignal  = pos ==  1 and (pos !=  1)[1]
shortsignal = pos == -1 and (pos != -1)[1]


plot(ema)

plotshape(longsignal, style=shape.triangleup, color=color.new(color.green, 0), text='BUY', editable=false, location=location.belowbar, size=size.small)
plotshape(shortsignal, style=shape.triangledown, color=color.new(color.black, 0), text='SELL', editable=false, location=location.abovebar, size=size.small)

请参见下面的图像，该图像没有逆转。