
There is some confusion here, the restrictions we're talking about is Schwab started to disallow some tickers to be traded through them due to "high risk". You can call them to remove that restriction so you can trade every ticker freely. What you're referring to is the ban on hyperscalpers. That's completely different, those scalpers would take 100-600 trades daily and abuse the free commission Schwab/TOS offered. They said it was "toxic order flow" and that those trades statistically were likely to lose money for the market maker. To sum it up these fast trades didn't position algos or market makers to hedge or profit from spreads, turning what should be a win-win into a loss for the "house." I believe the ban on that is permanent.
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