Tradingview Pine script

Hi, I use the BuySellSignal indicator in tradingview to enter and exit the market.

The indicator changes the colors of the bars and when it is one color it means that the trend is bullish and when it changes it is bearish.

I have my Oanda account connected to tradingview and I would like to be able to automate the indicator strategy for it to automatically enter and exit the market by buying or selling depending on the color of the bars.

What I need is that when the bar is green automatically send a purchase order and when it changes to red close the purchase position and open another for sale.