為甚麼指標不會顯示在正確的點位上呢??

var:up2(0),down2(0),up1_15(0),down1_15(0);

up2 = bollingerBand(C,7,2);

down2 = bollingerBand(C,7,-2);

plot1(up2,"up2");

plot2(down2,"down2");

up1_15 = bollingerBand(C,7,1.15);

down1_15 = bollingerBand(C,7,-1.15);

plot3(up2,"up1_15");

plot4(down2,"down1_15");

這個是程式碼，想請教一下為甚麼設定好的布林軌道卻不會顯示在正確的位置上??