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REI自编
绿线:-0.6,colorgreen;
红线:0.6,colorred; a1:=high; b1:=low; c1:=close; a2:=ref(high,2); a5:=ref(high,5); a6:=ref(high,6); b2:=ref(low,2); b5:=ref(low,5); b6:=ref(low,6); c7:=ref(close,7); c8:=ref(close,8); num1:=if(a2<C7 and a2<c8 and a1<b5 and a1<b6,0,1); num2:=if(b2>c7 and b2>c8 and b1>a5 and b1>a6,0,1); dif1:=a1-a2; dif2:=b1-b2; reii:=(dif1+dif2)*num1*num2; reia:=sqrt(dif1*dif1)+sqrt(dif2*dif2); rei:sum(reii,8)/sum(reia,8),colorwhite rei自编，范围膨胀指数，-0.6以下属弱势区，当指数由下向上穿越-0.6时预示市场走强，是买入信号；
0.6以上属强势区，当指数由上向下穿越0.6时预示市场走弱，是卖出信号；-0.6--0.6间为观望区 |
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