编写要求：
OBV:SUM(IF(CLOSE>REF(CLOSE,1),VOL,IF(CLOSE=B2 OR B1>=B3) OR B1=CMAX AND (B2=CMIN OR B3=CMIN) AND OBV>=B2 OR
B2=CMAX AND B3=CMIN AND OBV>=B1 OR B3=CMAX AND OBV>=B1 AND OBV>=B2,B1,OBV,3,0),COLORMAGENTA;
变盘:STICKLINE(OBV=CMAX AND B1=CMIN,B2,OBV,1,0),COLORWHITE;
DRAWTEXT(变盘,OBV,'变盘'),COLORWHITE;
下跌:=STICKLINE(OBV=CMIN AND (B1=B2 OR (B2=CMIN AND B1<=B3 OR
B3=CMIN AND B1<=B2) AND B2=B1,B1,B2,1,0),COLORRED;
DRAWTEXT(买入,OBV,'买入'),COLORRED;
抛售:STICKLINE(B1=CMAX AND OBVB3 OR
B3=CMAX AND B1>B2) AND B2>=B4 AND OBV 18) AND (COUNT((CLOSE < REF(CLOSE,1)),3) = 3)) AND ((COUNT((OBV > REF(OBV,1)),30) > 18) AND (COUNT((OBV > REF(OBV,1)),3) = 3))) AND ((COUNT((VOL > REF(VOL,1)),30) > 3) AND ((VOL / CAPITAL) <= (10 / 100)))),OBV,'买盘较强');
DRAWTEXT(((((COUNT((CLOSE > REF(CLOSE,1)),30) > 18) AND (COUNT((CLOSE > REF(CLOSE,1)),3) = 3)) AND ((COUNT((OBV > REF(OBV,1)),30) > 18) AND (COUNT((OBV > REF(OBV,1)),3) = 3))) AND ((COUNT((VOL > REF(VOL,1)),30) > 3) AND ((VOL / CAPITAL) <= (10 / 100)))),OBV,'买盘逐渐加强');}
DRAWTEXT((((COUNT((CLOSE > REF(CLOSE,1)),30) > 18) AND (COUNT((CLOSE > REF(CLOSE,1)),3) = 3)) AND ((COUNT((OBV < REF(OBV,1)),30) > 18) OR (COUNT((OBV < REF(OBV,1)),3) = 3))),OBV,'买盘无力');
DRAWTEXT((CROSS(OBV,0) AND (COUNT((REF(OBV,1) < 0),3) = 3)),OBV,'由负转正买入');
DRAWTEXT((CROSS(0,OBV) AND (COUNT((REF(OBV,1) > 0),3) = 3)),OBV,'由正转负卖出。');
DRAWTEXT(((HHV(HIGH,20) = HIGH) AND NOT((HHV(OBV,20) = OBV))),OBV,'顶背离卖'),COLORGREEN;
DRAWTEXT(((LLV(LOW,20) = LOW) AND NOT((LLV(OBV,20) = OBV))),OBV,'底背离买'),COLORRED;
DRAWTEXT((((ABS((OBV - REF(OBV,1))) / ABS(MA(OBV,5))) > 0.07) AND (OBV > REF(OBV,1))),OBV,'异常');
解答：
?obv:=sum(if(c>ref(c,1),vol,if(c
b1:=ref(obv,1);
