boredo Depends what you're trading, you can Google it. Even if the market is closed you can trade on Morpher, you will just trade using the last known price.
Another note on 24/7 trading: while you can trade 24/7 you will only see stock prices change visually during the Market Hours. During all other times the price difference between the last known price and the real current price is factored in to the spread. That's why you might see spreads as high as 8% in pre-market sometimes.