Sorry, sarcasm mode is currently off due to ingestion of a large quantity of M&Ms
You should try Mexican Pesos futures....
A few weeks ago- my mate bumped into a trader & put the two of us in touch. Turns out that he trades spreads - 2000 cars a day...
He says that for spreads - thinner is better because algos run a mile @ the first sign of a move and he was less than complimentary about the remaining traders.
It makes sense in spread trades - I mean, why trade an ultra-thick market for spreads? You'd be competing against algos that KNOW they have the liquidity to trade against.
I think that for outrights, the flip side might be true, the algos can participate in a thick market but they have to go with the flow, not arb out a small delta before anyone else can.
Any reason you trade such closely correlated markets? I presume you trade outrights...