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求：四线合一指标中"散户"和"中户"在4天内由80以上下跌至20以下选股公式？
四线合一源码：
散户:(CLOSE-LLV(LOW,5))/(HHV(HIGH,5)-LLV(LOW,5))*100,LINETHICK1,COLORYELLOW;
中户:(CLOSE-LLV(LOW,10))/(HHV(HIGH,10)-LLV(LOW,10))*100,LINETHICK1,COLORGREEN;
大户:(CLOSE-LLV(LOW,20))/(HHV(HIGH,20)-LLV(LOW,20))*100,LINETHICK1;
主力:(CLOSE-LLV(LOW,30))/(HHV(HIGH,30)-LLV(LOW,30))*100,LINETHICK2,COLORRED;
a:80,POINTDOT;
b:50,POINTDOT,COLORRED;
c:20,POINTDOT;
四线合一源码：
散户:(CLOSE-LLV(LOW,5))/(HHV(HIGH,5)-LLV(LOW,5))*100,LINETHICK1,COLORYELLOW;
中户:(CLOSE-LLV(LOW,10))/(HHV(HIGH,10)-LLV(LOW,10))*100,LINETHICK1,COLORGREEN;
大户:(CLOSE-LLV(LOW,20))/(HHV(HIGH,20)-LLV(LOW,20))*100,LINETHICK1;
主力:(CLOSE-LLV(LOW,30))/(HHV(HIGH,30)-LLV(LOW,30))*100,LINETHICK2,COLORRED;
a:80,POINTDOT;
b:50,POINTDOT,COLORRED;
c:20,POINTDOT;