Scalping with 15 seconds chart in MT5

 
Hi guys
I'm using Candle by Seconds EA to generate 15s timeframe. It's an offline chart, starting bars sequence based on the current bar of the M1 time frame. 
How can I trade on this custom timeframe / offline chart? I've tried to enable the One Click Trading and DOM but it did not work. 
 
It depends on what your trading rules are. If you use indicators, then you have to modify them to work on 15 second time based on incoming ticks.