仅在趋势发生变化时触发绘图形状或警报
buysignal = (close > vwap) and (close > ema24)
sellsignal = (close < vwap) and (close < ema24)
// draw some shapes on the chart if conditions are met
plotshape(buysignal, title = 'long', style=shape.triangleup, size=size.normal, text='up')
plotshape(sellsignal, title = 'short', style =shape.triangledown, size=size.normal, text='down')
// create alert conditions!
alertcondition(buysignal, title="Buy-Signal", message="bull")
alertcondition(sellsignal, title="Sell-Signal", message="bear")
我编写了一些类似上面的代码来识别趋势。您能否帮我弄清楚，如何仅在趋势从牛市变为熊市或相反时触发图形形状或警报，而不是在每根蜡烛收盘时触发？谢谢。
buysignal = (close > vwap) and (close > ema24)
sellsignal = (close < vwap) and (close < ema24)
// draw some shapes on the chart if conditions are met
plotshape(buysignal, title = 'long', style=shape.triangleup, size=size.normal, text='up')
plotshape(sellsignal, title = 'short', style =shape.triangledown, size=size.normal, text='down')
// create alert conditions!
alertcondition(buysignal, title="Buy-Signal", message="bull")
alertcondition(sellsignal, title="Sell-Signal", message="bear")
I have written some code like the above to identify trend. Can you please help me figure out, how do I trigger a plot shape or alert only when the trend changes from bull to bear or vice versa and not for every candle close? Thanks.
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将之前的状态与当前的状态进行比较。然后你在你的职能中。
Compare the previous state with the current state. Then you that in your functions.