多空和磁力线指标源码：

磁力线:(MA(CLOSE,30)+MA(CLOSE,72))/2,COLORGREEN;
多空线:(MA(CLOSE,3)+MA(CLOSE,6)+MA(CLOSE,12)+MA(CLOSE,24))/4;
 DRAWTEXT(CROSS(多空线,磁力线),多空线,'进场'),COLORGREEN,LINETHICK2;
 DRAWTEXT(CROSS(磁力线,多空线),磁力线,'走人'),COLORRED,LINETHICK2;
 DA:=(EMA(C,1)+EMA(C,2)+EMA(C,3)+EMA(C,4))/4;
 DB:=(EMA(C,10)+EMA(C,20)+EMA(C,40)+EMA(C,80))/4;
 DRAWTEXT(CROSS(DA-DB,0),L*0.95,'★B'),COLORRED;
 JH:=SMA(MAX(C-REF(C,1),0),5,1)/SMA(ABS(C-REF(C,1)),5,1)*100;
 DRAWTEXT(CROSS(84,JH),H*1.02,'☆S'),COLORGREEN;

地心引力区1:磁力线*1.1,LINETHICK2,COLORRED;
地心引力区2:磁力线*0.9,LINETHICK2,COLORFF33FF;
 

源码解析：

输出磁力线:(收盘价的30日简单移动平均+收盘价的72日简单移动平均)/2,画绿色
 输出 多空线:(收盘价的3日简单移动平均+收盘价的6日简单移动平均+收盘价的12日简单移动