In the historical data you've seen, did the intraday moves in the past spike(within ~5 minute time period) on economic data releases and then flatline until the next data release or market moving event? I've suspected this was the case, but I've never seen any proof of it. If the currencies end up like this someday, where you get a few 5 minute moves during the day and the rest of the time they are flat, the currencies would obviously be hard to day trade.
Thanks