Bolt of Jamaica won in the Men's 100m final at the World Athletics Championships Beijing 2015 Sunday with a time of 9.79 seconds.
In Market Order the order is executed as you place the order and the stocks are brought or sold at the market price.So if you place the order when the stock is trading at 1025, your order will be executed and you will get almost the same price. Limit Oder VS Market Order.
The exchange sets this highest limit at what it thinks would be a price that would cause manipulation or volatility. The price varies from commodity to commodity. Some markets will allow the contracts to resume trading if the price moves away from the day's limit.