62 lines
2.4 KiB
MQL5
62 lines
2.4 KiB
MQL5
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//+------------------------------------------------------------------+
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//| MarketBookEvent.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 "On start-up subscribe to market book notifications for specified symbol (if not empty). Otherwise monitor notifications, initiated by other programs."
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#property description "Events are shown in the Comment."
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#property indicator_chart_window
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#property indicator_plots 0
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#include "..\..\Include\PRTF.mqh"
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#include "..\..\Include\Comments.mqh"
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input string WorkSymbol = ""; // WorkSymbol (if empty, intercept events initiated by others)
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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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if(StringLen(WorkSymbol))
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{
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PRTF(MarketBookAdd(WorkSymbol));
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}
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else
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{
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Print("Start listening to OnBookEvent initiated by other programs");
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}
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}
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//+------------------------------------------------------------------+
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//| Market book notification handler |
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//+------------------------------------------------------------------+
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void OnBookEvent(const string &symbol)
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{
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ChronoComment(symbol + " " + (string)GetTickCount());
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function (dummy) |
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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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return rates_total;
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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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if(StringLen(WorkSymbol))
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{
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PRTF(MarketBookRelease(WorkSymbol));
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}
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}
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//+------------------------------------------------------------------+
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