As far as I know (please correct me), all commercial data feeds provide a limited number of simultaneous ticking items, e.g. up to 500 or 1000 symbols. In contrast, institutional traders often have access to data feeds which enable real time viewing/processing of tick data for every listed instrument on one or more exchanges, which has obvious advantages for system traders with programming skills. It may not be possible to use a 'complete' feed in combination with off-the-shelf trading software. E.g. NASDAQ, NYSE, and AMEX has approximately 8100 listed equities and to import the bid/ask/trade with volumes (48,600 ticking items) into an application such as TradeStation is probably not realistic.
Given a data feed which can provide all tick data for these three exchanges in real time while also retrieving historical tick data without bogging down a mid-range PC, would this be considered a good data offering or would it be largely meaningless because of being limited to traders who are also reasonably proficient at programming? I.e. would it be worth offering such a feed via an API, or is the market for such a specialized product simply too small?
Given a data feed which can provide all tick data for these three exchanges in real time while also retrieving historical tick data without bogging down a mid-range PC, would this be considered a good data offering or would it be largely meaningless because of being limited to traders who are also reasonably proficient at programming? I.e. would it be worth offering such a feed via an API, or is the market for such a specialized product simply too small?