Is it possible to disable the short position by Add On

[lychee]

If the current position is 0, disable the sell button or auto-reject the sell request.

Please tell me how to start.

[NinjaTrader_ChelseaB]

Hello lychee,

Welcome to the NinjaTrader forums!

Note, NinjaTrader does not support disabling any intended functionality, such as disabling buttons.

You could create an addon or indicator that adds custom buttons that submit orders, and use logic to prevent orders from being submitted.

Below is a link to an example indicator with custom buttons that submit orders.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1126570-changing-variables-within-an-indicator-from-another-indicator-with-buttons?p=1126818#post1126818

[lychee]

Thanks for replaying, but I have more questions.

In this video, (between 1:20 ~ 1:30)
He can disable trading if the products are not on the permit list.

Can you tell me how to implement it like that?

https://player.vimeo.com/video/718664859

[NinjaTrader_ChelseaB]

Hello lychee,

The script in this video appears to be disabling order buttons in the WPF of a chart based on the instruments in a list and is using unsupported and undocumented code to do so.

This would be very advanced to code in an addon.

Below is a link to a reference sample that demonstrates modifying WPF.

https://ninjatrader.com/support/helpGuides/nt8/creating-chart-wpf-(ui)-modifi.htm

As well as a link to an example that loops through existing charts using undocumented and unsupported code.

http://ninjatrader.com/support/forum/showthread.php?p=445541#post445541