I look around at other instruments and it's hard to match the volatility of cable. Something like crude oil would come close, both cable and crude can bust 20 pips a minute no problem, 50 pips an hour is not uncommon. each instrument is nuanced though, you see time based moves throughout the day based on fixings, different participants, different flows. I would not attempt to trade oil unless I had a good handle on the flows, the inventories, that's a whole different ball game. Point is if you are a directional trader then choose a volatile instrument and get to know it inside out, to the point of obsession.