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A51:3*SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1)-2*SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1);
买入线:EMA(A51,5);A54:=((CLOSE-LLV(LOW,21))/(HHV(HIGH,21)-LLV(LOW,21)))*100;
趋势线:(MA(3*SMA(A54,6,1)-2*SMA(SMA(A54,5,1),5,1),2));
DRAWTEXT(CROSS(趋势线,0)AND 买入线<40,(HIGH* 0.97),'▲买入'),COLORYELLOW;
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