Lightspeed Trader offers trading from 4am to 8pm ET. So does the demo but we do not offer long term demos. They are set to about 10 days. Live software also can request Blue Ocean night time trading from about 8:30pm to 4amET.
I do not know if your are located in the USA 1.Sterling DEMO is offered by Ross Cameron 2. DAS trader offers a DEMO without a broker account 3. Real Tick also has a DEMO You will off cause have to pay Hopes it helps
Premarket action can be erratic. I hope you're not trying to develop a trading understanding and strategy that happens during premarket. You'll likely get whipsawed around quickly. It's like dropping a whole bunch of golf balls out of a helicopter on top of a mountain. Not all of them will land on the ground predictably. There are individual variables and circumstances.
webull is free has premarket and demo. good for learning not so good for trading real money they sabotage you alot