Quote from chasmann:
I do, with Jtrader, on a 28k - 31k on a good day line. Split second fills most of the time. Order entry will not require a great amount of band width. Because of this a faster connection will not really help unless you are also trying to collect data.
I use a DTN satellite feed for the TS data so a smaller (56k) pipeline for order entry is as fast as I need.
Most people confuse bandwidth and speed. A higher number means that much more data per second. A small amount of data will get there at the same time. A large amount of data will take longer to go through the narrow line.
This means it all depends on what you want to do. If you want quotes and order entry and chat, 56k will not work. But for me it works great.
Chuck
Quotes are actually small bits of data: price, volume, time stamps, ECN & MM info, etc (text/numerical data). If your charting/broker package is on your PC, all the pretty pictures are generated by the computer and graphics info is NOT sent down the 'pipeline'. Graphics files, voice chat, web charts, video, etc, require relatively HUGE amounts of data compared to quotes and orders (orders being numerical only).
So, if you're just following a few stocks and indices, not in a voice/video trading room, not following 200 stocks, and don't have 10 browser windows open at the same time, then dial-up should work fine.
With QuoteTracker, from our generous bud Jerry, there is a data transmission/bandwidth indicator on the main screen. With 20 stocks and indices pulling data, and during heaving trading, I think the max transmission rate I've seen is 900 bits per second (.9 kb/s) -- .9 kb/s even compared to a 26.4 or 28.8 kb/s connection, well, looks like there's plenty of room on that "pipe".
I'm not trying to convince anyone that dial-up is all you need. I am one of those fanatics (for now) that is monitoring a voice trading room, NASDAQ Heatmaps, Briefing.com, Dow Jones News, 30-40 stocks, and vital-sign feedback data from Kaiser Permanente!

(HMO in California...) So, my configuration is cable with dial-up for back-up.
Hey, my cable connection has failed me a few times and I've shit a small brick while in a trade (editor's note: first cuss in a post). I would have shit a huge brick if I didn't have a dail-up to fall back on. It takes about 45 seconds to reconnect dialing up -- quicker than calling the broker!!!
(NOTE: With all of the above going on in my situation, the dial-up data transfer IS noticeably slower...)
FYI