1.---Execution depends on the price you have quoted and takes place anytime the market is trading.
2.There is no charge for placing an order for a security even if it is rejected.Charge is placed on transactions that are succesful.
3.You cannot sell an order u buy on Monday on Tuesday since there is a certain number of days u have to wait for the settlement of the trade
4.yes u can by looking at the market watch
Wealth is built through a relatively simple equation
Wealth=Income + Investments - Lifestyle