For currencies, I exclusively trade GBPUSD on the 30 minute chart using an algo I developed. Although it's the 30 minute timeframe, it'll only take positions during the London session, 99% of the time it's closed out before 11pm UK time. It's almost fully automated, though I adjust position sizes. In the last month or so, I've added to this with day trading the DAX via CFD on the 5 minute in my UK mornings, then switching to ES (Micro ES futures) also on the 5 minute in the UK afternoons. Both via a similar algo that I use for GBPUSD, again, with manually adjusted position sizing. So, all day trading, but across a couple of time-frames, where the 30 requires less focus compared to the 5.