I am seeking help with my iMac.

I am an independent Nasdaq day-trader using Trading View as an analytical platform on a daily basis - if it is possible, I would like to reprogram the ‘fn’ button (or any other button) on my Apple keyboard that when pressed, it’s initiates a string of letters. In this example, I would like it to input the letters: ‘⌥T’ — as these (2) buttons are what’s required draw a ‘trend-line’ on the platform. Instead of me manually having to click on the trend-line or pressing ⌥ and T simultaneously, is there any way I can reprogram the fn button on my keyboard so it initiate’s these letters? It’s predominately to save time and also because it’s quite awkward pressing the ⌥ and T buttons together with one hand. I know it’s such a small thing for everyone else, but believe it or not it would be a tremendous help to my workflow.

Thank you.