用来寻找技术形态的波峰或者是谷底。可以在适当的位置进行买卖操作；平行线是支撑或者压力线。

C3:=REF(C,1);
涨停:=IF((C-C3)*100/C3>=(10-0.01*100/C3),1,0),COLOR2DFFFF;
 STICKLINE(涨停,OPEN,CLOSE,3,0),COLOR00AAAA;
 STICKLINE(涨停,OPEN,CLOSE,2.5,0),COLOR00CACA;
 STICKLINE(涨停,OPEN,CLOSE,2,0),COLOR00E3E3;
 STICKLINE(涨停,OPEN,CLOSE,1.5,0),COLOR02FFFF;
 STICKLINE(涨停,OPEN,CLOSE,1,0),COLOR2DFFFF;
跌停:=IF((C3-C)*100/C3>=(10-0.01*100/C3),1,0),COLOR33FF33;
 STICKLINE(跌停,OPEN,CLOSE,3,0),COLOR00B700;
 STICKLINE(跌停,OPEN,CLOSE,2.5,0),COLOR00D200;
 STICKLINE(跌停,OPEN,CLOSE,2,0),COLOR00EA00;
 STICKLINE(跌停,OPEN,CLOSE,1.5,0),COLOR0FFF0F;
 STICKLINE(跌停,OPEN,CLOSE,1,0),COLOR33FF33;
 BDGD:=CROSS(0.8,H=HHV(H,6));
 GDSJ:=BARSLAST(BDGD)+1;
波峰:=REF(H,GDSJ),COLOR1EFF1E;
 BDDD:=CROSS(0.8,L=LLV(L,6));
 DDSJ:=BARSLAST(BDDD)+1;
波谷:=REF(L,DDSJ),COLOR7400E8;
 STICKLINE(GDSJ
 STICKLINE(DDSJ
二炮:=(-0.4*REF(C,4)-0.4*REF(C,3)-1.1*REF(C,2)+0.9*REF(C,1)+2*C);
攻击线:=SMA(二炮,4,2),colorred,LINETHICK2;
 {PARTLINE(攻击线,攻击线>REF(攻击线,1),RGB(210,0,105),攻击线
 VARA:=4*SMA((CLOSE-LLV(LOW,4))/(HHV(HIGH,4)-LLV(LOW,4))*100,4,1)-
 3*SMA(SMA((CLOSE-LLV(LOW,4))/(HHV(HIGH,4)-LLV(LOW,4))*100,4,1),3.2,1);
 VARB:=7;
 CC:=CROSS(VARA,VARB);
 DRAWTEXT(CC,L*0.98,’★’),COLOR00FFFF;
卖出:=CROSS(72,SMA(MAX(CLOSE-REF(CLOSE,1),0),6,1)/SMA(ABS(CLOSE-REF(CLOSE,1)),6,1)*100);
 DRAWTEXT(卖出,H*1.08,’◆’),colorgreen;