Hi Darling JuliaFisher, Did I miss something, since when brokerage houses provide live datafeed or do you mean brokerage houses that provde free datafeed for its clientele as an enticement, perhaps?
That all depends what you are trying to do, what software you have available. If you are talking about ms timeframes then that's stupidly complicated as in most cases you need to be next to the feed server racks. They will always be a latency, but to most it's not noticeable.
I should really attach an image of naked tits to my profile and surely I will get a lot Kinder treatment... Keyword: gullible
When you say fast, you mean for the purposes of execution? or just a data feed for viewing and testing. In case you are seeking a Futures feed, you may look here: https://optimusfutures.com/Datafeeds.php I hope it helps.
I also saw this exact same post from her in another online FX Forum - of which it also had a similar bag of answers