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Here is the general breakdown of various datafeeds.
Your data is just as important as your system.
First, major problems with RT feeds are:
- delays/speed
- low tick count/missing ticks
- bad ticks
- gaps/outages
- coverage/#of symbols supported
First about the most frequently mentioned now: e-signal.
DBC is pushing e-signal heavily and claiming the
best datafeed provider out there. As as matter of fact
their feed is the not the best yet.
BMI, about 4-5 years ago used to be the best overall provider
of stock and futures data. But, then they got bot out by DBC
and the feed deteriorated from then on. With market tick volume
ever increasing BMI speed is limited to 38KB is now slow.
DBC then started dropping some services from BMI to clear up some
bandwidth. DBC is most likely trying to phase BMI out, same for their FM
feeds
and is pushing internet delivery heavily. They have been trying to
penetrate historical data market (EOD) unsuccessfully for a year now.
BMI does not provide historical data.
Overall score on a scale from 1 to 10:
DBC - 3-4 Cheapest.
BMI - 4-5 Cheap.
SP comstock, similar to the above and is a common source for L2
outfits. Bad ticks are common, no filtering and no historical
data. Coverage is good. Is not supported by TS2000.
Overall score: 4-5 Moderately priced.
DTN - is a good company and have a decent feed. Faster speed
56KB, twice the bandwidth over sat. Good coverage.
But, again no filtering, bad ticks and no historical data. Works
good with TS2000. Has both stocks and futures. Has good
following among mid size brokers. Has more customers than
BMI and DBC combined. It's the best non internet feed for
TS2000.Overall score: 6-7 Relatively cheap.
PCQuote - is probably the best internet feed at this time, fast,
good data, solid company, but same problems, no historical data,
and connections are intermittent, limited coverage. Supported
by TS2000. Popular L2 feed for some L2 outfits.
Overall score: 5-6. Relatively cheap.
FS - great futures feed, bad tick correction on the fly, historicals.
But only has futures. Has been a choice datafeed for TS/futures
traders. Overall score: 7-8. But does not cover equities. Moderately
expensive.
NON - TS feeds:
CQG - probably the best overall non TS datafeed for trading,
fast, reliable, tick correction, has historical database of 1 min
ascii data. Overall score: 8-9 but is not supported in TS
Expensive.
Suggestions:
if you are a serious trader and not using TS system capability,
get CQG
if you are a trading futures only and using TS systems,
get FS.
if you are trading futures and stocks and options actively and using TS,
get DTN
if you are trading just stocks with TS systems but actively,
get DTN or PCQuote if you prefer internet delivery.
if you trade just a few stocks discretionary using or not using TS
or experimenting with systems get E-signal.
and
get BMI if you want it all, don't want to pay a lot and want to tweak,
trade some and exchange data with other traders.
my own preference for stock/futures/options feeds starting with the best:
CQG,DTN,FS,PCQ,SP,BMI,DBC. - had them all one time or another,
seen CQG and FS in action.
overall all around winner for TS: DTN sat feed.
second runner up: PCQ
.i still like BMI. used to be a good feed.
overall the worst: DBC.
this is more or less, common knowledge, in TS trading
community.
Bilo.
also see my post on historical data.
not trying to sell anything.
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