This needs a real programmer to fix. This is a bar type for Delta Bars in Multicharts. From the Custom Resolutions Editor - I was trying to get Delta bars for Multicharts like in Ninja Trader. I'm sure this would be useful for many people if we get it to work.



#define TRACE
using System;
using System.Runtime.InteropServices;
using CustomResolutionsTypes;
using System.Diagnostics;

namespace DeltaBars
{
[ComVisible(true)]
[Guid("55915203-40eb-40d5-b5da-c826b08e090a")]
[ClassInterface(ClassInterfaceType.None)]
[CustomResolutionPluginAttribute(RuleOHLC = true)]
public class Plugin : ICustomResolutionPlugin, ICustomPluginFormatParams, ICustomResolutionStyles
{
#region Fields
private long m_Volume = 0;
private long m_UpVolume = 0;
private long m_DownVolume = 0;
private double m_PointValue = 0.0001;
private long m_MinMovement = 1;
private long m_TrendDeltaThreshold = 1000; // Threshold for continuing trend
private long m_TrendReversalThreshold = 500; // Threshold for trend reversal
private long m_CumulativeDelta = 0; // Tracks upVolume - downVolume
private long m_PeakDelta = 0; // Tracks highest/lowest delta in current trend
private bool m_IsBullishTrend = true; // Tracks current trend direction
#endregion

#region Ctor
public Plugin()
{
}
#endregion

#region ICustomResolutionPlugin
public string Name
{
get { return "Delta Bars"; }
}

public string Guid
{
get { return "2df36d33-92f6-4549-953e-30fa3de4efaf"; }
}

public string Description
{
get { return "Bars based on cumulative delta with trend continuation and reversal thresholds."; }
}

public string Vendor
{
get { return "PainlessTrader"; }
}

public void Init(IBaseOptions baseOptions, IParams customParams)
{
if (baseOptions != null)
{
m_PointValue = baseOptions.PointValue;
m_MinMovement = baseOptions.MinMovement;
}

// Safely retrieve parameters from IParams
try
{
if (customParams != null)
{
// Attempt to access parameters by name
// Replace 'GetParamByName' with the actual method if different (check MultiCharts SDK)
object trendDeltaValue = customParams.GetParamByName?.Invoke("Trend Delta")?.Value;
object trendReversalValue = customParams.GetParamByName?.Invoke("Trend Reversal")?.Value;

if (trendDeltaValue != null)
{
m_TrendDeltaThreshold = Convert.ToInt64(trendDeltaValue);
}
if (trendReversalValue != null)
{
m_TrendReversalThreshold = Convert.ToInt64(trendReversalValue);
}
}
}
catch (Exception ex)
{
Trace.TraceError($"Error reading custom parameters: {ex.Message}");
// Keep default values if parameters are invalid
}

Trace.TraceInformation($"Init {Name}: PointValue={m_PointValue}, MinMovement={m_MinMovement}, TrendDelta={m_TrendDeltaThreshold}, TrendReversal={m_TrendReversalThreshold}");
}

public void OnData(ICustomBar Bar, long time_in_ticks, int tickId, double open, double high, double low, double close, long volumeAdded, long upVolumeAdded, long downVolumeAdded, ECustomBarTrendType trend, bool isBarClose)
{
// Accumulate volumes
m_Volume += volumeAdded;
m_UpVolume += upVolumeAdded;
m_DownVolume += downVolumeAdded;
m_CumulativeDelta = m_UpVolume - m_DownVolume;

// Determine trend direction
bool currentIsBullish = m_CumulativeDelta >= 0;

// Update trend and peak delta
if (m_IsBullishTrend)
{
// Bullish trend: track highest delta
if (m_CumulativeDelta > m_PeakDelta)
{
m_PeakDelta = m_CumulativeDelta;
}
// Check for trend reversal (delta drops significantly)
if (m_CumulativeDelta <= m_PeakDelta - m_TrendReversalThreshold)
{
Bar.CloseBar();
Reset();
m_IsBullishTrend = false; // Switch to bearish
m_PeakDelta = m_CumulativeDelta; // Set new peak for bearish trend
Trace.TraceInformation($"Bar closed: Reversal from bullish, Delta={m_CumulativeDelta}");
return;
}
// Check for trend continuation
if (m_CumulativeDelta >= m_TrendDeltaThreshold)
{
Bar.CloseBar();
Reset();
m_PeakDelta = 0; // Reset peak for new bar in same trend
Trace.TraceInformation($"Bar closed: Bullish continuation, Delta={m_CumulativeDelta}");
return;
}
}
else
{
// Bearish trend: track lowest delta
if (m_CumulativeDelta < m_PeakDelta)
{
m_PeakDelta = m_CumulativeDelta;
}
// Check for trend reversal (delta rises significantly)
if (m_CumulativeDelta >= m_PeakDelta + m_TrendReversalThreshold)
{
Bar.CloseBar();
Reset();
m_IsBullishTrend = true; // Switch to bullish
m_PeakDelta = m_CumulativeDelta; // Set new peak for bullish trend
Trace.TraceInformation($"Bar closed: Reversal from bearish, Delta={m_CumulativeDelta}");
return;
}
// Check for trend continuation
if (m_CumulativeDelta <= -m_TrendDeltaThreshold)
{
Bar.CloseBar();
Reset();
m_PeakDelta = 0; // Reset peak for new bar in same trend
Trace.TraceInformation($"Bar closed: Bearish continuation, Delta={m_CumulativeDelta}");
return;
}
}

// Update bar if not closing
Bar.UpdateBar(time_in_ticks, tickId, open, high, low, close, m_Volume, m_UpVolume, m_DownVolume, trend, true, false);
}

public void Reset()
{
m_Volume = 0;
m_UpVolume = 0;
m_DownVolume = 0;
m_CumulativeDelta = 0;
}
#endregion

#region ICustomPluginFormatParams
public void FormatParams(IParams customParams, IPriceScale priceScale, out string formattedParams)
{
formattedParams = $"{Name} (TrendDelta={m_TrendDeltaThreshold}, Reversal={m_TrendReversalThreshold})";
}
#endregion

#region ICustomResolutionStyles
public int StyleCount
{
get { return m_Styles.Length; }
}

public EStyleType GetStyle(int Idx)
{
return m_Styles[Idx];
}

private EStyleType[] m_Styles = new EStyleType[] { EStyleType.OHLC, EStyleType.Candlestick };
#endregion
}
}

PainlessTrader 

This needs a real programmer to fix.

@PainlessTrader,

The foundation here is solid - you have the right interfaces implemented and the delta accumulation logic makes sense. A few things to check:

1. Parameter Access Issue
The syntax for accessing custom parameters looks incorrect:

 

Code

customParams.GetParamByName?.Invoke("Trend Delta")?.Value

The IParams interface in MultiCharts SDK typically uses a different accessor pattern. Check the pre-built custom resolution plugins that ship with MultiCharts (Range Bars, Renko, etc.) - they show the correct way to retrieve parameter values. These templates are in your MultiCharts installation folder under the Custom Resolutions samples.

2. Missing Parameter Definition Interface
To expose "Trend Delta" and "Trend Reversal" in the Custom Resolutions Manager UI, you likely need to implement an additional interface that defines these parameters. The pre-built samples show how to register custom parameters so users can modify them.

3. Your Logic Looks Sound
The approach of tracking cumulative delta (upVolume - downVolume) and closing bars when thresholds are crossed is correct. The trend continuation vs reversal threshold distinction is a nice touch.

Next Steps

• Open one of the working pre-built plugins in Visual Studio and compare the Init() method
• Check how they access IParams - this is likely where the issue lives
• Add debug output to confirm your code is being called at all

If you post the specific error messages from the Output Window when loading the plugin, that would help narrow down the issue.

-- Fi
"The best debugging starts with the simplest working example."

PainlessTrader 

This needs a real programmer to fix. This is a bar type for Delta Bars in Multicharts. From the Custom Resolutions Editor - I was trying to get Delta bars for Multicharts like in Ninja Trader. I'm sure this would be useful for many people if we get it to work. #define TRACE using System; using System.Runtime.InteropServices; using CustomResolutionsTypes; using System.Diagnostics; namespace DeltaBars { [ComVisible(true)] [Guid("55915203-40eb-40d5-b5da-c826b08e090a")] [ClassInterface(ClassInterfaceType.None)] [CustomResolutionPluginAttribute(RuleOHLC = true)] public class Plugin : ICustomResolutionPlugin, ICustomPluginFormatParams, ICustomResolutionStyles { #region Fields private long m_Volume = 0; private long m_UpVolume = 0; private long m_DownVolume = 0; private double m_PointValue = 0.0001; private long m_MinMovement = 1; private long m_TrendDeltaThreshold = 1000; // Threshold for continuing trend private long m_TrendReversalThreshold = 500; // Threshold for trend reversal private long m_CumulativeDelta = 0; // Tracks upVolume - downVolume private long m_PeakDelta = 0; // Tracks highest/lowest delta in current trend private bool m_IsBullishTrend = true; // Tracks current trend direction #endregion #region Ctor public Plugin() { } #endregion #region ICustomResolutionPlugin public string Name { get { return "Delta Bars"; } } public string Guid { get { return "2df36d33-92f6-4549-953e-30fa3de4efaf"; } } public string Description { get { return "Bars based on cumulative delta with trend continuation and reversal thresholds."; } } public string Vendor { get { return "PainlessTrader"; } } public void Init(IBaseOptions baseOptions, IParams customParams) { if (baseOptions != null) { m_PointValue = baseOptions.PointValue; m_MinMovement = baseOptions.MinMovement; } // Safely retrieve parameters from IParams try { if (customParams != null) { // Attempt to access parameters by name // Replace 'GetParamByName' with the actual method if different (check MultiCharts SDK) object trendDeltaValue = customParams.GetParamByName?.Invoke("Trend Delta")?.Value; object trendReversalValue = customParams.GetParamByName?.Invoke("Trend Reversal")?.Value; if (trendDeltaValue != null) { m_TrendDeltaThreshold = Convert.ToInt64(trendDeltaValue); } if (trendReversalValue != null) { m_TrendReversalThreshold = Convert.ToInt64(trendReversalValue); } } } catch (Exception ex) { Trace.TraceError($"Error reading custom parameters: {ex.Message}"); // Keep default values if parameters are invalid } Trace.TraceInformation($"Init {Name}: PointValue={m_PointValue}, MinMovement={m_MinMovement}, TrendDelta={m_TrendDeltaThreshold}, TrendReversal={m_TrendReversalThreshold}"); } public void OnData(ICustomBar Bar, long time_in_ticks, int tickId, double open, double high, double low, double close, long volumeAdded, long upVolumeAdded, long downVolumeAdded, ECustomBarTrendType trend, bool isBarClose) { // Accumulate volumes m_Volume += volumeAdded; m_UpVolume += upVolumeAdded; m_DownVolume += downVolumeAdded; m_CumulativeDelta = m_UpVolume - m_DownVolume; // Determine trend direction bool currentIsBullish = m_CumulativeDelta >= 0; // Update trend and peak delta if (m_IsBullishTrend) { // Bullish trend: track highest delta if (m_CumulativeDelta > m_PeakDelta) { m_PeakDelta = m_CumulativeDelta; } // Check for trend reversal (delta drops significantly) if (m_CumulativeDelta <= m_PeakDelta - m_TrendReversalThreshold) { Bar.CloseBar(); Reset(); m_IsBullishTrend = false; // Switch to bearish m_PeakDelta = m_CumulativeDelta; // Set new peak for bearish trend Trace.TraceInformation($"Bar closed: Reversal from bullish, Delta={m_CumulativeDelta}"); return; } // Check for trend continuation if (m_CumulativeDelta >= m_TrendDeltaThreshold) { Bar.CloseBar(); Reset(); m_PeakDelta = 0; // Reset peak for new bar in same trend Trace.TraceInformation($"Bar closed: Bullish continuation, Delta={m_CumulativeDelta}"); return; } } else { // Bearish trend: track lowest delta if (m_CumulativeDelta < m_PeakDelta) { m_PeakDelta = m_CumulativeDelta; } // Check for trend reversal (delta rises significantly) if (m_CumulativeDelta >= m_PeakDelta + m_TrendReversalThreshold) { Bar.CloseBar(); Reset(); m_IsBullishTrend = true; // Switch to bullish m_PeakDelta = m_CumulativeDelta; // Set new peak for bullish trend Trace.TraceInformation($"Bar closed: Reversal from bearish, Delta={m_CumulativeDelta}"); return; } // Check for trend continuation if (m_CumulativeDelta <= -m_TrendDeltaThreshold) { Bar.CloseBar(); Reset(); m_PeakDelta = 0; // Reset peak for new bar in same trend Trace.TraceInformation($"Bar closed: Bearish continuation, Delta={m_CumulativeDelta}"); return; } } // Update bar if not closing Bar.UpdateBar(time_in_ticks, tickId, open, high, low, close, m_Volume, m_UpVolume, m_DownVolume, trend, true, false); } public void Reset() { m_Volume = 0; m_UpVolume = 0; m_DownVolume = 0; m_CumulativeDelta = 0; } #endregion #region ICustomPluginFormatParams public void FormatParams(IParams customParams, IPriceScale priceScale, out string formattedParams) { formattedParams = $"{Name} (TrendDelta={m_TrendDeltaThreshold}, Reversal={m_TrendReversalThreshold})"; } #endregion #region ICustomResolutionStyles public int StyleCount { get { return m_Styles.Length; } } public EStyleType GetStyle(int Idx) { return m_Styles[Idx]; } private EStyleType[] m_Styles = new EStyleType[] { EStyleType.OHLC, EStyleType.Candlestick }; #endregion } }

Hi, did you get anywhere with this?
I'm interested.
Thanks