>> They can develop their own charting platform. They fully control how data is processed from the tick level. This allows them to do things such as merge multiple datafeeds and have multiple layers of processing that would be a lot more difficult if not impossible to do in a standard charting
Tommy Reid was a trader. Actually he was a developer, but in his spare time he also did some trading and because of that he thought of himself as a trader. He did software development somehow by obligation, albeit he liked this one too, but his true vocation was trading, he considered. In spite of that he was doing serious trading extremely seldom, about once a year. Otherwise he was extremely busy with software development tasks. But once a year he let everything aside and started trading. Ne never managed to get anything (profitable) and neither did he have proper trading tools (models, backtests, quality marketdata, fast executions, automated systematic engines) but the trader, with or without tools, is still a trader. And if anyone happened to ask Tommy what was his job, he smiled contemptuously and didn't say nothing, because he considered you can see on his face he's a trader and if some guy doesn't get this thing, then it's that guy's business, because Tommy is still a trader.