Something that I have seen in Omega Tradestation and MT4. The ability to display and work with custom/ non-standard timeframes.
Instead of D1,H8,H6,H4,H1,m30,m15,m5,m1 we can have the ability to display a 37 minute timeframe or a 217 minute timeframe where each bar is 217 minutes long for example.
You are able to use those bars the same way as you would do with any of the standard timesframes. e.g. existing indicators and strategies work the same way but, just using 37 minute bars instead of 15 minute bars.