After that you can look at his PHP Course here:
And you will also need to look at MySQL - database that you need for PHP:
Hope this gets you started.... should keep you busy for a long time :)
I tried to backtest from the oldest data available on a chart period to now, print the values of the indicator, but it always return the wrong value 2xxxcfrew, even with the most recent pin bars. I guess the tester runs without waiting for the indicator to get the data for the bar it's testing.
Did someone managed to make this indicator work with an EA and more importantly have it work in the backtester ?