How Can I Trade Stocks During the Pre-Market or Post-Market?

Overview:

By default, orders for some products are entered with a restriction referred to as Regular Trading Hours (RTH) Only. This restriction may prevent submitted orders from executing during the pre and post market sessions. The following article will clarify this time restriction as well as how it can be modified.

Background:

There are risks inherent in trading outside of Regular Trading Hours (RTH) including reduced liquidity, increased volatility, and expanded error trade guidelines that traders should be aware of and willing to assume prior to transmitting active orders into the market during these times.