Screenshot using GetChartBitmap on DataSet

Author: quaresma

Creation Date: 1/16/2019 10:50 AM

Wealth Lab » WealthScript (.NET) » Screenshot using GetChartBitmap on DataSet

quaresma

1/16/2019 10:50 AM

Hi, i hame simple trading code.
I want to take a screenshot every time a CrossOver or Crossover event occurs . Do not overwrite the picture, and make a new one. In the current code, WL takes a snapshot of the last part of the DataSet. Can it be done using the method GetChartBitmap at each event ? Now i have one snapshot (in attach)
Thank you!

CODE:
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XBTUSD@Bitmex.Bar.Time.300.png

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Hi, i hame simple trading code. 
I want to take a screenshot every time a CrossOver or Crossover event occurs . Do not overwrite the picture, and make a new one. In the current code, WL takes a snapshot of the last part of the DataSet. Can it be done using the method GetChartBitmap at each event ? Now i have one snapshot (in attach)
Thank you!

[code]using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using WealthLab;
using WealthLab.Indicators;
using Community.Indicators;

namespace WealthLab.Strategies
{
	public class MyStrategy : WealthScript
	{
		StrategyParameter strategyParameter1;

StrategyParameter strategyParameter3;
		//StrategyParameter strategyParameter4;
		StrategyParameter strategyParameter5;

public MyStrategy()
		{
			strategyParameter1 = CreateParameter("Parameter 1", 6, 0.05 ,20, 0.05);
		
			strategyParameter3 = CreateParameter("Parameter 3", 25, 5, 300, 5);
			//strategyParameter4 = CreateParameter("Parameter 4", 20, 5, 40, 1);
			strategyParameter5 = CreateParameter("Parameter 5", 5, 1, 10,0.5);
			
		}

protected override void Execute()
		{
			DataSeries smaFast = SMA.Series(Close,120);
			DataSeries smaSlow = SMA.Series(Close,320);
			
			
			PlotSeries(PricePane,smaFast,Color.Green, WealthLab.LineStyle.Solid, 2);
			PlotSeries(PricePane,smaSlow,Color.Red, WealthLab.LineStyle.Solid, 2);
		
			for(int bar = 20; bar < Bars.Count; bar++)
			{
				
				if (IsLastPositionActive)
				{
					Position p = LastPosition;
					if(p.PositionType == PositionType.Long)
					
						if(CrossUnder(bar,smaFast, smaSlow))
						{
							AnnotateBar("Open Short",bar+1,true,Color.DarkRed);
							
						}
					
					if(p.PositionType == PositionType.Short)
					
						if(CrossOver(bar,smaFast, smaSlow))
						{
							AnnotateBar("Open Long",bar+1,true,Color.DarkGreen);		
						}
						
					//code your exit rules here
				}
				else
				{
					if(CrossOver(bar, smaFast, smaSlow))
						AnnotateBar("Long",bar+1,true,Color.DarkGreen);
					else if(CrossUnder(bar, smaFast, smaSlow))
						AnnotateBar("Short",bar+1,true,Color.DarkRed);
					//code your entry rules here
				}
			}
			Bitmap bm = GetChartBitmap( 1500, 900 );
			bm.Save(@"C:\tmp\" + Bars.Symbol + ".png", System.Drawing.Imaging.ImageFormat.Png );
 
		}
	}
} [/code]

Eugene

1/16/2019 11:53 AM

Hi,

This question was raised many times before and the resolution was always that one cannot achieve this with GetChartBitmap alone. You'll find the the whys and wherefores in these threads:

Looping through DataSet and saving chart image
Output chart image by program as file
Printing multiple charts

There still may be a couple of workarounds:

1. Sounds like code in post #5 worked for its author "elliottp" but not for me: Iterate through a DataSetSymbols list and save chart bitmap images (post #5). Please note that this code is unsupported due to its use of undocumented classes, kindly don't ask us to look into it if it doesn't work for you.

2. A kludgy workaround using AutoIT may be possible: Printing multiple charts (see my post #3). Coding it is all on you.

If neither one works out you're out of luck. :(