ABC通道源码：
{AN 1-999任意数
BN 3-999任意数
CN 2-999任意数
BN CN 要小于AN
转换 1画上升线 2画下降线 }
A:CURRBARSCOUNT,NODRAW;
AB:DRAWLINE(CURRBARSCOUNT=AN,IF(转换=1,L,H),CURRBARSCOUNT=AN-BN,IF(转换=1,L,H),1);
H线:=CONST(DRAWLINE(CURRBARSCOUNT=AN-CN,IF(转换=1,H,L),REF(CURRBARSCOUNT=AN-CN,1),REF(IF(转换=1,H,L),1),1));
线L:=CONST(DRAWLINE(CURRBARSCOUNT=AN-CN,AB,REF(CURRBARSCOUNT=AN-CN,1),REF(AB,1),1));
平行线:(H线-线L)+AB, COLOR8E0000;
中间线:(平行线+AB)/2, COLOR0088EE;
DRAWTEXT(CURRBARSCOUNT=AN,IF(转换=1,L,H),'A');
DRAWTEXT(CURRBARSCOUNT=AN-BN,IF(转换=1,L,H),'B');
DRAWTEXT(CURRBARSCOUNT=AN-CN,IF(转换=1,H,L),'C');
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