forked from rosh/MQL5Book
128 lines
4.6 KiB
MQL5
128 lines
4.6 KiB
MQL5
//+------------------------------------------------------------------+
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//| SymbolTickSpy.mq5 |
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//| Copyright 2022, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "2022, MetaQuotes Ltd."
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#property link "https://www.mql5.com"
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#property description "Send custom events to specified chart upon receiving new ticks on symbols from a list. "
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"Fill MqlTick structures with price/volume data on every tick.\n"
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#property indicator_chart_window
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#property indicator_plots 0
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#define TICKSPY 0xFEED // 65261
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input string SymbolList =
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"EURUSD,GBPUSD,XAUUSD,USDJPY,USDCHF"; // List of symbols, comma separated (example)
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input ushort Message = TICKSPY; // Custom message id
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input long Chart = 0; // Receiving chart id (do not edit)
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input int Index = 0; // Index in symbol list (do not edit)
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string Symbols[];
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int Spreads[];
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int SelfIndex = -1;
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function |
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//+------------------------------------------------------------------+
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void OnInit()
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{
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PrintFormat("Starting for chart %lld, msg=0x%X [%s]", Chart, Message, SymbolList);
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if(Chart == 0)
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{
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if(StringLen(SymbolList) > 0)
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{
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const int n = StringSplit(SymbolList, ',', Symbols);
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ArrayResize(Spreads, n);
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for(int i = 0; i < n; ++i)
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{
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if(Symbols[i] != _Symbol)
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{
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ResetLastError();
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// run this indicator on different symbols with different settings,
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// specifically we pass ChartID to get notifications back from other symbols
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iCustom(Symbols[i], PERIOD_CURRENT, MQLInfoString(MQL_PROGRAM_NAME),
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"", Message, ChartID(), i);
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if(_LastError != 0)
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{
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PrintFormat("The symbol '%s' seems incorrect", Symbols[i]);
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}
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}
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else
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{
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SelfIndex = i;
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}
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Spreads[i] = 0;
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}
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}
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else
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{
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Print("SymbolList is empty: tracking current symbol only!");
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Print("To monitor other symbols, fill in SymbolList, i.e. 'EURUSD,GBPUSD,XAUUSD,USDJPY'");
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}
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}
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total, const int prev_calculated, const int, const double &price[])
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{
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if(prev_calculated)
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{
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if(Chart > 0)
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{
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// send tick notification to requesting chart
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EventChartCustom(Chart, Message, Index, 0, NULL);
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}
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else if(SelfIndex > -1)
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{
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OnSymbolTick(SelfIndex);
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}
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}
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return rates_total;
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}
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//+------------------------------------------------------------------+
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//| Chart event handler |
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//+------------------------------------------------------------------+
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void OnChartEvent(const int id, const long &lparam, const double &dparam, const string &sparam)
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{
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if(id == CHARTEVENT_CUSTOM + Message)
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{
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OnSymbolTick((int)lparam);
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}
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}
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//+------------------------------------------------------------------+
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//| Multisymbol tick custom event |
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//+------------------------------------------------------------------+
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void OnSymbolTick(const int index)
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{
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const string symbol = Symbols[index];
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MqlTick tick;
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if(SymbolInfoTick(symbol, tick))
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{
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Spreads[index] = (int)MathRound((tick.ask - tick.bid)
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/ SymbolInfoDouble(symbol, SYMBOL_POINT));
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string message = "";
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for(int i = 0; i < ArraySize(Spreads); ++i)
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{
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message += Symbols[i] + "=" + (string)Spreads[i] + "\n";
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}
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Comment(message);
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}
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}
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//+------------------------------------------------------------------+
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//| Finalization handler |
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//+------------------------------------------------------------------+
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void OnDeinit(const int)
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{
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Comment("");
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}
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//+------------------------------------------------------------------+
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