Open Source Trading Automation Frameworks?

[comintel]

My impression with Tradestation is that it uses a proprietary language (easy language?) which has it's limitations. If our goal is in the direction of Ai/ML functionality, easy language doesn't really support that does it?

Just on EasyLanguage compatibility, "MultiCharts PowerLanguage is 99% compatible with EasyLanguage"

So if one writes in TradeStation EasyLanguage, one can later move the code out to MultiCharts with minimal conversion effort to access the many brokerage API's supported by MultiCharts.