Quote from richardyu301:
eSignal covers much more markets while TS supports US market only.
And sometimes ppl may prefer to hv more than one system to back up each other.
eSignal is really expensive.... esp true when you can now use TS free if you trade enough contracts there. So it seems that a lot ppl are switching from eSignal to TS.
A lot ppl may stay with eSignal for the time being b'coz they are used to it, hv their systems written in EFS, or hv binding contract with them. But eventually eSignal may need to adjust their price otherwise a lot of their customers will leave.