YC:=FORCAST((C+L+H)/3,5); 趋势线:EMA(3*YC-2*SMA(YC,2,1),21),COLORYELLOW; DD:=FORCAST(趋势线,90); 做多:(3)*(趋势线) - (2)*(DD),LINETHICK1,COLORFF00FF,LINETHICK2; 做空:(3)*(DD) - (2)*(趋势线),LINETHICK2,COLORGREEN;
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