I took all the coins and all the coin pairings on Bitfinex to make two separate Total L/S ratios. One just takes the L/S for all coins and averages them evenly.
The second, and I think superior method is where I take the total longs for each coin and mulitiply by the coin price, doing the same for the shorts. This gives a L/S ratio that is properly weighted for the value of longs/shorts.