If your MT5 platform can use a template to show 15s candles, yes, no problem to do that. However, as you say, you will need something external to create those candles. Sadly, I'm not the guy who knows how to do that.
@shashikant987 Generate a new question for this. It looks like you have added this using the MQ file so it should work. You will have to test with it, but some indicators just simply don't work
