关于概率问题，请帮我解决一下，最好详细一些 ，主要是公务员考试里运用的，如C（3，5）=10.请详细哦！

可以把你的交易思路写出来吗？那样我可以帮你写这个MT4公式。MT4和大智慧的公式不一样，相差很大。大智慧的公式编写不严谨。 写好了：#property indicator_chart_window#property indicator_buffers 2#property indicator_color1 Green#property indicator_width1 1#property indicator_color2 Red#property indicator_width2 1double Vup[];double Vdn[];//+------------------------------------------------------------------+//| Custom indicator initialization function |//+------------------------------------------------------------------+int init() { SetIndexBuffer(0,Vup); SetIndexBuffer(1,Vdn); SetIndexStyle(0,DRAW_ARROW); SetIndexStyle(1,DRAW_ARROW); SetIndexArrow(0,241); SetIndexArrow(1,242); return(0); }//+------------------------------------------------------------------+//| Custom indicator deinitialization function |//+------------------------------------------------------------------+int deinit() {//---- //---- return(0); }//+------------------------------------------------------------------+//| Custom indicator iteration function |//+------------------------------------------------------------------+int start() { int limit; double length1; double length2; double length3; int counted_bars=IndicatorCounted(); if ( counted_bars < 0 ) return(0); if(counted_bars>0) counted_bars--; limit=Bars-counted_bars; for (int i=0; i<limit; i++) { length1 = Point*(High[i+1]-Low[i+1]); length2 = Point*(High[i+2]-Low[i+2]); length3 = Point*(High[i+3]-Low[i+3]); if (Low[i+3]>Low[i+2] && Low[i+2]<Low[i+1] && High[i+3]>High[i+2] && High[i+2]<High[i+1]) { if (Digits == 4) Vup[i+2]=Low[i+2]-6*Point; if (Digits == 5) Vup[i+2]=Low[i+2]-60*Point; } if (High[i+3]<High[i+2] && High[i+2]>High[i+1] && Low[i+3]<Low[i+2] && Low[i+2]>Low[i+1]) { if (Digits == 4) Vdn[i+2]=High[i+2]+6*Point; if (Digits == 5) Vdn[i+2]=High[i+2]+60*Point; } }//---- return(0); }