通达信MACD反推价副图指标 判断和预测股价趋势的走向 源码
股价趋势的走向首先最快反应的是表现在MACD量柱的长短上，绿柱逐渐变短、红柱逐渐变长，趋势逐步走好、走强。
红柱逐渐变短，绿柱逐渐变长，趋势逐步走弱、走坏。
其次是反应在DIF的走向上，DIF拐头向上趋势走好，DIF拐头向下趋势走弱。
DIF向上金叉DEA趋势走强，DIF向下死叉DEA趋势走坏。
反推价格的节点，就能判断和预测股价趋势的走向：
1、如未达到柱体变向的价格，红柱就会变短，绿柱就会变长。反之绿柱变短、红柱变长。
2、如未达到DIF拐头价格，DIF向下时继续往下，DIF向上时拐头往下，反之DIF向下时拐头向上，DIF向上时继续向上。
3、如未达到金叉死叉价格时，不形成两线交叉，反之两线交叉，DIF从下往上交叉DEA时为金叉，DIF从上往下交叉DEA时为死叉。
SHORT:=9;
LONG:=19;
M:=7;
DIF:EMA(CLOSE,SHORT)-EMA(CLOSE,LONG);
DEA:EMA(DIF,M);
MACD:(DIF-DEA)*2,COLORSTICK;
X_1:=(M-1)/(M+1)*DEA/(1-2/(M+1));
X_2:=(MACD/2+DEA*(M-1)/(M+1))/(1-2/(M+1));
X_3:=(DIF*(SHORT+1)*(LONG+1)-(LONG+1)*(SHORT-1)*EMA(CLOSE,SHORT)+(SHORT+1)*(LONG-1)*EMA(CLOSE,LONG))/(2*(LONG+1-(SHORT+1)));
X_4:=(X_1*(SHORT+1)*(LONG+1)-(LONG+1)*(SHORT-1)*EMA(CLOSE,SHORT)+(SHORT+1)*(LONG-1)*EMA(CLOSE,LONG))/(2*(LONG+1-(SHORT+1)));
X_5:=(X_2*(SHORT+1)*(LONG+1)-(LONG+1)*(SHORT-1)*EMA(CLOSE,SHORT)+(SHORT+1)*(LONG-1)*EMA(CLOSE,LONG))/(2*(LONG+1-(SHORT+1)));
DRAWNUMBER_FIX(1,0.12,0.002,0,CONST(X_3)),COLORLIRED;
DRAWNUMBER_FIX(1,0.26,0.002,0,CONST(X_5)),COLORYELLOW;
DRAWNUMBER_FIX(1,0.4,0.002,0,CONST(X_4)),COLORFFDD44;
