高于90 ，进入高风险区，提示卖出，低于20，进入低风险区域，低于10，提示提示买入。

RSV:=(CLOSE-LLV(LOW,N))/(HHV(HIGH,N)-LLV(LOW,N))*100;

K:SMA(RSV,M1,1);

D:SMA(K,M2,1);

高风险区:90,colormagenta;

低风险区:20,colorlicyan;

安全区:10,colorgreen;

DRAWTEXT(CROSS(D,高风险区),D,'减仓'),colorred;

DRAWTEXT(CROSS(D,安全区),低风险区,'买入'),colorwhite;