study("[blackcat] L3 Super Best Cost Line", overlay=true, max_bars_back=5000, max_labels_count=500)
//functions xrf(values, length) => r_val = float(na) if length >= 1 for i = 0 to length by 1 if na(r_val) or not na(values) r_val := values r_val r_val
//定义典型价格wcx wcx = (2*high + low + high + open/2) / 4.5 //3根K线中最高点 hh = highest(high,3) //3根K线中最低点 ll = lowest(low,3) //高点创新高并且典型价格上涨 ch1 = (hh > xrf(hh,1) and wcx>xrf(wcx,1)) //低点创新低并且典型价格下跌 ch2 = (ll < xrf(ll,1) and wcx<xrf(wcx,1)) //向上突破K线回溯索引值 k3 = barssince(ch1) //向下突破K线回溯索引值 k4 = barssince(ch2) //最近有向上突破或者创新高并且不能有创新低 k5 = (k3<k4 or ch1) and not(ch2) //最近有向下突破或者创新低并且不能有创新高 k6 = (k3>k4 or ch2) and not(ch1) //如果向上突破则取最低价作为退出准则(跟踪止损放飞利润),否则取开始向前期低点(做多止损位) zc = iff(hh>xrf(hh,1) and wcx>xrf(wcx,1),ll,xrf(ll,barssince(hh>xrf(hh,1) and wcx>xrf(wcx,1)))) //如果向下突破则取最高价作为推出准则(跟踪止损放飞利润),否则取开始向前期高点 (做空止损位,A股不需要) yl = iff(ll<xrf(ll,1) and wcx<xrf(wcx,1),hh,xrf(hh,barssince(ll<xrf(ll,1) and wcx<xrf(wcx,1)))) //如果向上突破,则按算法生成止损退出价格 bcl = iff(k5,zc,yl)
long = (crossover(wcx,bcl) and direction < 0) or (direction[1]>0 and direction<0) xlong = crossunder(wcx,bcl) and direction < 0 or (direction[1]<0 and direction>0) short = (crossover(wcx,bcl) and direction > 0) or (direction[1]<0 and direction>0) xshort = crossunder(wcx,bcl) and direction > 0 and not xlong and not long
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