Quote from puddles:
From you p/l posts it looks like you're using sterling. how are your hot keys set up?
I don't scalp but I have a feeling if you scalp you probably have a lot better hot key setup than me.
Also, how often are you taking liquidity vs. providing? ECN/SEC fees must really add up with that kinda volume.
I have a very insane layout. My fingers are long so I can reach keys many can't, but shift Q,W,E,R,T,Y are my cancels, shift A,S,D,F,G,H,J,K are my sells, shift+Z,X,C,V,B,N,M are my buys, CTRL+A,S,D,F,G,H,J,K are also sells, and CTRL+Z,X,C,V,B,N,M are also buys. Shift + ; and shift + ' are also buy/sell keys, as well as shift+[ and shift +].
I use numpad to change order quantity, and I use the arrow keys to change price around.
You can estimate my add/take ratio by looking at my gross:net. I'll give you a hint... I add a lot.