What is mark to market profit/loss in stock futures ? How is it calculated by the stock exchange?

I trade in futures segment of stock.When I buy a lot of a stock & sell it the contract note for each buy & sell shows mark to market loss or profit which is totally different as per the difference in amount of buy & sell ? What is it & how is it calculated? pl.describe in detail.

Do you think Clean Energy Stocks will be the stocks of the 21st Century.?

I think companies that provide clean energy like solar, wind and nuclear power, will be some of the best traded stocks of the future. I think they will replace Exxon, Shell and Standard Oil companies this century. It may be a few years down the road, but I think all of us can see this coming.

What is "IML" in futures options trading?

A broker says that my IML has been reduced; what is IML?

Suggestion:

I would presume it means "Initial Margin Level", which means that they are probably now allowing you to trade at the normal exchange margin rates, rather than a higher rate that they sometimes set for small or new traders.

Does anyone know any trading platform where I can practice with a virtual account and actually look at charts?

1. an actual trading platform were I can look through differnt charts.
2. but the actual markets i.e. nasdaq, dow jones, etc.
3. futures, options would be nice but Im just looking for actual stocks

Types of traders/trading jobs within investment bank?

I want to sit in front of a screen draw trend lines, follow the market prices and trade throughout the day or every frew days (particularly futures and/or options). I dont want to be a broker, I dont have $25k to become a day trader, so what types of trading jobs are out there? What type of trading jobs are within an investment bank and how do I find one of those jobs? How do I get a job in a trading room?