There's no good reason for any company putting itself up as a brokerage to have a 60-90 minutes window for any equity or options trade. They most definitely hav

There's no good reason for any company putting itself up as a brokerage to have a 60-90 minutes window for any equity or options trade. They most definitely have the ability to cap that window, and cap it to a much smaller range. They just choose not to--probably so they have some plausible deniability or wiggle room to fleece people like the OP.