压力与支撑（源码、主图、通达信、贴图）箱底买，箱顶卖

N:=5;
MA250:=MA(CLOSE,250),COLORMAGENTA,LINETHICK3;
{N(3,30,5);}
【箱顶】:PEAK(3,N,1)*0.999;
【箱底】:TROUGH(3,N,1)*0.999;
【箱高】:=1*(【箱顶】-【箱底】)/【箱底】;
K线运行的升幅:=(MA(H,3)-REF(MA(H,3),1))*100/REF(MA(H,3),1);{NODRAW;}
{ML:=EMA(L,7),COLORMAGENTA;
MH:=MA(H,7),COLORGRAY;
趋势线:MA((MH+ML)/2,3),LINETHICK1,COLORGREEN;
趋势线1:IF(趋势线>REF(趋势线,1),趋势线,DRAWNULL),LINETHICK2,COLORMAGENTA;}
{八周均线}
VAR1:MA(C,7),COLORGREEN;
VAR1A:IF(VAR1>REF(VAR1,1),VAR1,DRAWNULL),COLORRED;
DRAWICON(CROSS(C,VAR1),L*0.99,1);
DRAWICON(CROSS(VAR1,C),H*1.00,2);
XDU:=IF(EMA(EMA(EMA(C,2),2),2)>REF(EMA(EMA(EMA(C,2),