Quote from mokwit:
Credit where due. IB 'gets it' regarding investing in infrastructure for execution speed. I was trading HSI with 2-300ms of ISP latency and was only at a slight disadvantage due to IB execution speed making up for ISP latency. My guess is that the local brokers underinvest in capacity and their clients lose out while inadequate server capacity checks their margin availablity (this, rather than internet infrastucture is the usual cause of observable execution latency).
Also I found the 'snapshot' data approach to be much better than tick by tick with e.g. eSignal being about a minute behind in a fast market ( a long time in HSI). Bloomberg have a server located in HK so a large swathe of the professional market are getting prices with negligible lag. if you have data feed latency you are seeing prices that are longer current.
Actually Datafeed Latency is quite common for HK retail traders (those that I know of); hance I kept asking Kiwi about ping time since I might move around this year..