I bet nobody of you looked at 23 hour chart of EUR or GBP. But this is the chart that will reveal some secrets to you as a trader. Take a better look at it. I have no logical explanation to this but its robotic nature is effective in forecasting impulsive price moves.
You can use RSI with 23 hours chart. I find it esp useful as it is using closing prices, which are clearly cyclical on 23 hrs chart.