//+------------------------------------------------------------------+ //| Moving Average.mq4 | //| Copyright 2005-2014, MetaQuotes Software Corp. | //| http://www.mql4.com | //+------------------------------------------------------------------+ #property copyright "2005-2014, MetaQuotes Software Corp." #property link "http://www.mql4.com" #property description "Moving Average sample expert advisor" #define MAGICMA 20131111 //--- Inputs input double Lots =0.1; input double MaximumRisk =0.02; input double DecreaseFactor=3; input int MovingPeriod =60; input int MovingShift =1; //+------------------------------------------------------------------+ //| Calculate open positions | //+------------------------------------------------------------------+ int CalculateCurrentOrders(string symbol) { int buys=0,sells=0; //--- for(int i=0;i0) return(buys); else return(-sells); } //+------------------------------------------------------------------+ //| Calculate optimal lot size | //+------------------------------------------------------------------+ double LotsOptimized() { double lot=Lots; int orders=HistoryTotal(); // history orders total int losses=0; // number of losses orders without a break //--- select lot size lot=NormalizeDouble(AccountFreeMargin()*MaximumRisk/1000.0,1); //--- calcuulate number of losses orders without a break if(DecreaseFactor>0) { for(int i=orders-1;i>=0;i--) { if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==false) { Print("Error in history!"); break; } if(OrderSymbol()!=Symbol() || OrderType()>OP_SELL) continue; //--- if(OrderProfit()>0) break; if(OrderProfit()<0) losses++; } if(losses>1) lot=NormalizeDouble(lot-lot*losses/DecreaseFactor,1); } //--- return lot size if(lot<0.1) lot=0.1; return(lot); } //+------------------------------------------------------------------+ //| Check for open order conditions | //+------------------------------------------------------------------+ void CheckForOpen() { double ma; int res; //--- go trading only for first tiks of new bar if(Volume[0]>1) return; //--- get Moving Average ma=iMA(NULL,0,MovingPeriod,MovingShift,MODE_SMA,PRICE_CLOSE,0); //--- sell conditions if(Open[1]>ma && Close[1]ma) { res=OrderSend(Symbol(),OP_BUY,LotsOptimized(),Ask,3,Bid-300*Point,Ask+600*Point,"",MAGICMA,0,Blue); return; } //--- } //--- //+------------------------------------------------------------------+ //| OnTick function | //+------------------------------------------------------------------+ void OnTick() { //--- check for history and trading if(Bars<100 || IsTradeAllowed()==false) return; //--- calculate open orders by current symbol if(CalculateCurrentOrders(Symbol())==0) CheckForOpen(); //--- } //+------------------------------------------------------------------+