_Tutorial168 is designed for RadarScreen using price series providers (PSPs) to calculate the moving average for monthly, weekly, daily and minute bars. The moving averages are compared with the closing price of of the current PSP bar. If the close is higher than the moving average of that interval a variable (Score) is incremented by one. If it is less then the variable is decremented by one.
The tutorial demonstrates how to create a method that can be called to create several PSPs. The method has two inputs: the first input is the interval type is a string (e.g. “Monthly”, “Weekly”) etc. The second
input is the interval span expressed as an integer. This input only applies to minute bars. The method outputs a PSP. Update and a state changed events are created for each PSP.
The price series providers are loaded once when the indicator is first applied or reapplied to the chart. In this example the indicator is applied to a 5 minute bar. The calculation of the ‘score’ is done at the end of each bar. The plots are also updated at the end of each bar. For each of the four bar intervals the close of the PSP bar and the moving average are plotted. The ‘score’ is also plotted.
Note that a PSP does not reveal any historical data after the datetime of the current bar being processed, in this case the 5 minute bar. No events are raised for historic data.
The tutorial program works with TradeStation versions 9.5 and 10.
See other examples of using PSPs here.
In this example the ‘Update value intrabar’ is not selected.
The programming techniques discussed include:
- Using multiple price series providers
- Creating a double input method that outputs a price series provider
- Using the update and state change events
- The switch statement
Video walk through of the tutorial program
Download the tutorial 168 TradeStation EasyLanguage indicator
If you want to save yourself some typing, the tutorial 168 program is available for immediate download for $29.95 by clicking the following button. You can pay using PayPal or credit card. The program works with TradeStation 9.5, and TradeStation 10 but, unfortunately, is not compatible with MultiCharts.
The download consists of _Tutorial168 (the program developed in the tutorial).
The indicator is not protected, in other words, you will be able to see, modify and experiment with the tutorial’s code as well as use it as a template for your own projects.
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