Here is the story of my quest for the retail data feed provider. I used to be with an Opentick for 2 years. I was complaining about them - you know, almost no support, some bugs (that I was able to fix myself - it was open source), some (although small) inconvinuences. As many of you know, company closed the on Mar 16 - just 4 days before I finished my program that I was working on for almost 2 years and was ready to go to production. Bammer! Now, I needed someone else as a replacement for the data feed. Here what I needed: - Data feed provider should have an API. Yes, I have my own blackbox, and I don't need any of those lousy 'trade stations' - I want the program to work for me, not me working for the program. - I should be able to use that API from my program. And, surprise, it's C++ compiled to 64 bit - yes, I use hell of a lot of memory for my logic, and my workstation is quite a beast (32GB RAM, and I would be happy to get more). Well, to clarify, after being unable to find any other provider that could give me that (Opentick worked with no issues - I recomplied their source myself to 64 bit), I found a way to overcome this problem. Solution is not ideal, and I don't like it (I have 2 programs now - main for calcs, which is 64 bit, and one for data supply, which is 32 bit, and they talk over shared memory), but there is no other way, as NO OTHER data feed provider gives me 64-bit DLL. - The API should be a) efficient and b) provide all the data I need. Let me elaborate here. Here what I need from the feed: 1. Give me list of ALL equities available for trading right now, along with the yesterday's volume. I then sort them, get 500-1000 most active ones, and then apply my trading logic to them. I'm not going to manually enter all these equities - after all, companies open/close every day, and I dont' want to spend my time tracking them. I made a program to be ABSOLUTELY automatic. 2. Give me level 1 and level 2 tick-by-tick real time data feed WITH TIME INFO. You would be surprised how many data provides skip time information in their bid/ask data. As for the efficiency, I was tracking 1000 equities in realtime with Opentick, and feed alone was taking less than 1% (this is not a typo - yes, less than ONE percent) of the CPU power. 3.It should be reliable. I know, there are many grades, but make it at least this way - if you can't provide good data (for exampe, during market surge), just stop the feed - don't provide late/false data. In my view, I'm not asking too much, am I? I think, these are the basics of what any decent data feed provider should provide. And finally, I'm not a millionaire to pay skyrocket prices for the feed - otherwise, why I would need that program in the first place? I would be happy to pay $100 per month, can (not happily) pay $200/month, and would be almost dying, but still possible to pay $300/month. Over that - sorry, I can't. So I started my quest. And very soon realized, that Opentick, that I was complaining about, in reality was an ideal, that no company can even touch. Darn! First of all, about 90% don't have an API. You can access the feed with their program only - thank you very much. Half of the companies I called don't even work with individuals. The others charge $750 and more per month. Two companies hung their phones as soon as they heard word 'API'. Three companies didn't answer an email (they didn't have phone# listed). Two companies never returned voice mail. Many companies keep the DOCUMENTATION for their API under the hood (like IQ Feed and Marketfeed/Datainc), so you don't even know if they have what you need until you pay them for the API (!). Let me rant here a little bit more. I understand payment for the service (the feed). I have no idea why to pay for the DOCUMENTATION for your API! It's like saying 'I might have what you need, I might not, but you will not now until you pay me'. Some brokers provide you with the good feed (>500 symbols realtime) if you have an account with them, and actively use it. I'm not against it, but either their comissions are too high, or they don't have trade API, or they can't provide what I need. Ameritrade is the bright exception here. Over half of the providers want to have an additional piece of their junk software to be installed on your machine in order to provide you with the feed - IQ Feed, eSignal, IB etc. Man, they should fire their programmers immediately for this idea. Who the heck needs another link in a chain to break?! Why Opentick, Ameritrade, Genesis etc can provide you with the API that is standalone, and others can't? I spent a week online researching companies, and called over 30 of them. All-in-all, here are my findings: 1. First place (with exception) goes to Ameritrade. They have a standalone API (accessible as DLL), which is very efficient for level 2 quotes, and very bad for level 1 quotes (they pass too much non-needed data with it). Their feed is free if you have an account with them, and they satisfy all my needs as a broker - decent pricing, good (although unnecessary complex) API, and ability to place complex orders (one triggers another etc). The exception is - their API does not supply me with the list of equities. 2. Second place goes to IQ Feed. I really don't want to award them with it, but there is just no one else out there. Pluses: they have an API, and they have list of equities. Minuses - they place an additional piece of software of your machine (sort of mini-server), that you need to connect to. It is reported to be buggy (crashes) and boggy (takes up to 80% of CPU time). And, oh yes, they want money for docs - you would not see them until you pay $300. Nice, right? The only feed that comes close to what I need, is "big brother" of IQ Feed - NXCore. But there is small "but" - they start from $500/month. Actually, I can't believe this is 21st century, and there is still NO decent real time market data feed provider. Where the heck is the so-called 'competition' of the companies for the customers?! OK, I vented. It looks like I will be going with IQ Feed (unfortunately) for the list of equites + Ameritrade for the rest of the feed, but... Opentick, where are you?!