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aamoraruaamoraru
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1.02
1. Added a multi-timeframe (MTF) mode. 2. Added a cTrader version of the Recent High/Low Alert indicator. 3. Added a sound-only alert option. 4. Added an input parameter (Shift) to use select the starting point for recent High/Low calculation. 5. Clarified the TriggerCandle parameter's description.
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‎Recent High Low Alert.cs

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// -------------------------------------------------------------------------------
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// Draws lines on the high/low of the recent N bars from selected timeframe.
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// Alerts when the Bid price of the current bar crosses previous high/low.
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// Shift parameter allows displaying High/Low from previous periods.
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//
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// Version 1.02
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// Copyright 2025, EarnForex.com
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// https://www.earnforex.com/indicators/Recent-High-Low-Alert/
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// -------------------------------------------------------------------------------
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using System;
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using cAlgo.API;
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using cAlgo.API.Internals;
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namespace cAlgo.Indicators
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{
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[Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
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public class MTFRecentHighLowAlert : Indicator
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{
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[Parameter("Timeframe", DefaultValue = "Current")]
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public TimeFrame SelectedTimeFrame { get; set; }
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[Parameter("N", DefaultValue = 20, MinValue = 1, Group = "Main")]
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public int N { get; set; }
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[Parameter("Shift", DefaultValue = 0, MinValue = 0, Group = "Main")]
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public int Shift { get; set; }
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[Parameter("Trigger Candle", DefaultValue = TriggerCandle.Previous, Group = "Main")]
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public TriggerCandle TriggerCandleOption { get; set; }
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// Not implemented?
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//[Parameter("Native Alerts", DefaultValue = false, Group = "Alerts")]
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//public bool EnableNativeAlerts { get; set; }
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[Parameter("Sound Alerts", DefaultValue = false, Group = "Alerts")]
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public bool EnableSoundAlerts { get; set; }
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[Parameter("Sound Type", DefaultValue = SoundType.Announcement, Group = "Alerts")]
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public SoundType SoundType { get; set; }
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[Parameter("Email Alerts", DefaultValue = false, Group = "Alerts")]
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public bool EnableEmailAlerts { get; set; }
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[Parameter("Email Address", DefaultValue = "", Group = "Alerts")]
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public string EmailAddress { get; set; }
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[Output("High", LineColor = "DodgerBlue", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
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public IndicatorDataSeries High { get; set; }
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[Output("Low", LineColor = "Yellow", PlotType = PlotType.Line, LineStyle = LineStyle.Solid, Thickness = 1)]
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public IndicatorDataSeries Low { get; set; }
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private DateTime LastHighAlert = new DateTime(1970, 1, 1);
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private DateTime LastLowAlert = new DateTime(1970, 1, 1);
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private bool PriceAboveHigh = false;
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private bool PriceBelowLow = false;
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private Bars _timeframeBars;
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private TimeFrame _usedTimeFrame;
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public enum TriggerCandle
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{
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Current = 0,
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Previous = 1
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}
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private enum Direction
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{
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HIGH,
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LOW
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}
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protected override void Initialize()
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{
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// Determine the timeframe to use
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if (SelectedTimeFrame.ToString() == "Current")
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_usedTimeFrame = TimeFrame;
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else
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_usedTimeFrame = SelectedTimeFrame;
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// Check if selected timeframe is lower than current
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if (_usedTimeFrame < TimeFrame)
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{
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_usedTimeFrame = TimeFrame;
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Print("Selected timeframe is lower than current chart timeframe. Using current timeframe instead.");
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}
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// Get bars for the selected timeframe
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_timeframeBars = MarketData.GetBars(_usedTimeFrame);
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}
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public override void Calculate(int index)
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{
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// Get the corresponding index on the selected timeframe
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var currentTime = Bars.OpenTimes[index];
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var tfIndex = _timeframeBars.OpenTimes.GetIndexByTime(currentTime);
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if (tfIndex < 0)
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{
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// No corresponding bar found, use previous values
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if (index > 0)
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{
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High[index] = High[index - 1];
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Low[index] = Low[index - 1];
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}
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return;
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}
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// Apply shift
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tfIndex -= Shift;
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// Check if we have enough bars
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if (tfIndex - N + 1 < 0)
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{
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// Not enough data, use previous values
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if (index > 0)
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{
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High[index] = High[index - 1];
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Low[index] = Low[index - 1];
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}
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return;
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}
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// Find highest high and lowest low in the last N bars of selected timeframe
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double highest = 0;
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double lowest = double.MaxValue;
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for (int i = 0; i < N; i++)
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{
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if (tfIndex - i < 0) break;
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double highValue = _timeframeBars.HighPrices[tfIndex - i];
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double lowValue = _timeframeBars.LowPrices[tfIndex - i];
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if (highValue > highest) highest = highValue;
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if (lowValue < lowest) lowest = lowValue;
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}
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High[index] = highest;
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Low[index] = lowest;
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// Alert checking (only in real-time)
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if (IsLastBar && index == Bars.Count - 1)
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{
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int triggerIndex = (int)TriggerCandleOption;
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double currentHigh = High[index - triggerIndex];
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double currentLow = Low[index - triggerIndex];
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// Check if price crossed above high
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if (Symbol.Bid > currentHigh)
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{
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// Only alert if we weren't already above high
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if (!PriceAboveHigh && LastHighAlert != Bars.OpenTimes[index])
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{
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SendAlert(Direction.HIGH, currentHigh, index);
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PriceAboveHigh = true;
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}
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}
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else
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{
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// Price is not above high, reset flag
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PriceAboveHigh = false;
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}
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// Check if price crossed below low
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if (Symbol.Bid < currentLow)
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{
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// Only alert if we weren't already below low
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if (!PriceBelowLow && LastLowAlert != Bars.OpenTimes[index])
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{
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SendAlert(Direction.LOW, currentLow, index);
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PriceBelowLow = true;
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}
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}
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else
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{
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// Price is not below low, reset flag
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PriceBelowLow = false;
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}
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}
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}
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// Issues alerts and remembers last sent alert time.
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private void SendAlert(Direction direction, double price, int index)
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{
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string alert = "Local ";
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string subject;
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string tfStr = _usedTimeFrame.ToString();
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if (direction == Direction.HIGH)
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{
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alert += $"high ({tfStr})";
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subject = $"High broken @ {Symbol.Name} - {tfStr}";
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LastHighAlert = Bars.OpenTimes[index];
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}
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else if (direction == Direction.LOW)
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{
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alert += $"low ({tfStr})";
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subject = $"Low broken @ {Symbol.Name} - {tfStr}";
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LastLowAlert = Bars.OpenTimes[index];
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}
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else
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{
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// Default (some enum error)
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subject = "Error";
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}
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alert += $" broken at {price.ToString("F" + Symbol.Digits.ToString())}.";
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//if (EnableNativeAlerts)
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//{
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// Not implemented?
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//Notifications.ShowPopup("Recent High/Low Alert", alert, PopupNotificationState.Information);
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//}
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if (EnableSoundAlerts)
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{
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Notifications.PlaySound(SoundType);
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}
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if (EnableEmailAlerts && !string.IsNullOrEmpty(EmailAddress))
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{
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Notifications.SendEmail(EmailAddress, EmailAddress, subject,
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$"{Server.Time.ToString("yyyy-MM-dd HH:mm:ss")} {alert}");
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}
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}
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}
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}

‎RecentHighLowAlert.mq4

6.95 KB
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‎RecentHighLowAlert.mq5

8.78 KB
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