把这个底背离指标改成主图提示

编写要求：

VA:=IF(CLOSE>REF(CLOSE,1),VOL,-VOL); OBV:SUM(IF(CLOSE=REF(CLOSE,1),0,VA),0); MAOBV:MA(OBV,30); 底背离:=((LLV(LOW,20) = LOW) AND NOT((LLV(OBV,20) = OBV))); DRAWTEXT(底背离,OBV,'底背离'); 效果如123

股票网解答：

va:=if(close>ref(close,1),vol,-vol);

obv:=sum(if(close=ref(close,1),0,va),0);

maobv:=ma(obv,30);

底背离:=((llv(low,20) = low) and not((llv(obv,20) = obv)));

drawtext(底背离,l,'底背离'),colorb0f200;

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