Hi Avenlin,
The rules can change if you’re active during pre- and post- market sessions. For instance, some brokers we’ve tested only permit certain order types – often limit orders only, with no market, stop, or stop-limit.
There can be a lower limit on maximum position sizes too, e.g. the total number of shares you can buy.
Commission fees are typically the same, but due to lower liquidity, you may see wider spreads and experience partial fills. So higher costs overall and worse entries/exits.
Pre- and after-hours trading is normally only permitted on certain stocks too, most commonly large-cap US equities.
The actual hours you can trade can vary as well – some firms offer 24-hour trading, whereas other platforms focus on the few hours around main trading sessions (this is more common).
Ultimately, brokers can have different rules during extended hours trading. I suggest checking the specifics with the brokerage you have in mind. Equally, if you share their name we’re happy to dig into this for you.
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