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Tutorial 156 | Import data in CSV file and draw it on a chart

tutorial156-workspace

A Gold Pass member asked for a tutorial about how to import data stored in Comma Separated Values file (CSV file) and use it to draw rectangles on a chart.

This tutorial envisages two scenarios. In the first, each line of the file contains two price levels and a color. The tutorial program processes the data and draws a box between the two price levels all the way across the chart. The color of the rectangle is set to the color contained on the same line as the levels.

In the second scenario each line in the CSV file also contains and start date and time and an end date and time. Boxes are drawn between the two date/times and between the two levels.

A sample data file for the second part of the program
This tutorial only applies to TradeStation. It was written in version 9.5 and has been tested in version 9.5 and 10.

The first part of the tutorial lines are drawn similar to the following:

The following is an example of the output from the second part of the tutorial:

Programming notes

In both programs the EasyLanguage StreamReader is used to read in the data from the CSV file. In the first part of the program, a print out of the contents of the TokenList using the following code:

For Ctr = 0 to TL.Count - 1
Begin
Print( " Item ", Ctr," ", TL.Item[Ctr] );
End;

Results in the following:

In both parts of the tutorial a method is created named DrawBox. The methods share the same name however in the first part of tutorial the method does not process date/times and uses BNPoints to create the rectangle. In the second part, which uses start date/times and end date/times, the method uses DTPoints to create the rectangle.

// The syntax used in this tutorial
// In the first part of the tutorial BN point objects are used:
// The zero is the bar number. BNPoint uses an absolute bar index (zero-based)

ZoneBox = Rectangle.Create( BNPoint.Create( 0, Line1 ), BNPoint.Create( 0, Line2 ) );

// In the second example DT point objects are used

ZoneBox = Rectangle.Create( DTPoint.Create( dt1, Line1 ), DTPoint.Create( dt2, Line2 ) );

Tutorial 156 video

This unprotected and commented programs (i.e. the TradeStation EasyLanguage show-me studies):

  • _Tutorial156 (the program developed in the first part of the tutorial)
  • _Tutorial156-w-datetime (the program developed in the second part of the tutorial)

are available for immediate download for $24.95 by clicking the following ‘add to cart’ button where you may pay with a credit card or by using PayPal.

The program is compatible with versions TradeStation 9.5 and above, including 10. It is not compatible with MultiCharts.

THESE INDICATORS, SHOW ME STUDIES, STRATEGIES AND OTHER PROGRAMS HAVE BEEN INCLUDED SOLELY FOR EDUCATIONAL PURPOSES.

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