As the one above me said it, you just need to download the file and open it with your broker metaeditor software. From that, you just try to compile to see for any errors (haven't seen one) and then click on "play" icon or click on "F5", so that it will run on MT4
Thanks for sharing the indicator. I am not into indicator though. I trade based on price action. However, I must appreciate your contribution. Together we are always stronger.