Help with haikin ashi bars as a trigger

Hello im new to the forum and im new to code on pretty much all languages
i have a strategy that im trying to code but i dont know how i can use haikin ashi candles as a trigger to start my strategy.

I need to make the program know if the last haikin ashi candle ends in up trend or down trend and in base to that make a trading desicion

thanks in advance.

What have you tried?

You might want to complete the Zorro strategy workshop from start to end. This will give you the context you need.
https://zorro-project.com/manual/en/tutorial_var.htm