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To answer deaddog's question, one major thing I've learned is that trying to day trade on such a flaky, unreliable connection, is a complete non-starter, which is why I'm working on this right now. I have lost money several times due to this problem. Another lesson is that I needed a better data feed, which is why I just wrote some scripts yesterday to automatically fetch ticker data from Yahoo. I'd been using the Fidelity chart which is absolute garbage, and doesn't even have an auto-refresh feature, so you have to keep clicking the button to get new data. My new system has a "ticker" script fetching quotes every second, writing it to a flat file, then another script converts that into a format suitable for Gnuplot to generate an auto-updating graph.
I'm well aware that most of my moves have been shit so far, and as you can see, I've been hard at work identifying the exact problems and solving them. I hope to get these foundational issues worked out soon so I can actually focus all my time and energy on the trading.