You question is confusing because it is often unclear if you are talking about the price of the option or the price of the underlying stock. Here is what I think you meant to say:

Question: "Assume I purchased call options with a strike price of 105 rs when a stock was at 100 rs per share. If the stock goes to 106 rs can I sell the option at that time?"

Answer: Yes. You can sell the option any time prior to expiration. It does not matter if the stock is (or ever has been) above the strike price.

Question: "It the stock goes up to 106 then comes back down to 99 can I say it reached the strike price?"

Answer: Yes, it reached the strike price, but that makes no difference whatsoever. The price of the option depends upon several factors, one of which is the current price of the stock. Any previous price at which the stock traded is not a factor.

Question: "Should I have sold the option when the stock was at 106 rs?"

Answer: You would get more money by selling the option when the stock was at the higher price, but at the time the stock was at 106 rs you had no way of knowing if the stock would keep going up or if it would go down. Consequently, when the stock was at 106 rs you had no way of knowing that it would be better to sell it at that time.

————-

From your question I strongly encourage you to learn more about options trading before investing any real money in options.

DIY?

Online trading has lowered commissions to the point where they are no longer the primary consideration. Ditto for good execution, if indeed they are Direct Access. If you decide later to trade commodities, options, futures, or currencies, TerraNova may be the only one that you can trade everything, real time, online, direct access. A lot of online brokerages claim to give you direct access, but if they take more than a second to execute your trade, it aint direct.

What you probably should be concentrating on is the best trading software or trading platform. But even then, everyone's criteria are different.

Find the articles online that have evaluated and compared online brokerages. I found a good one online in Barron's, but you'll find others in the trading magazines. Active Trader, Futures Mag, etc.

This is worth putting a little time and effort into, because it's a pain to switch, so once you choose, you're kinda stuck with it.

Townsend Electronics, the Parent company of TerraNova, is the one that digitized and electronified the Nasdaq. They are technological industry leaders and have a powerful and well built trading system.

I use RealTick at TerraNovaOnline, but it costs $275/mo. I think the Investor package is free to use, and just uses one screen.

What you should try is a free trial of their Investor platform, which is free. Their rates are good also, but of course, it depends on how often you trade. It will take you months to learn all the bells and whistles of what this program can do.

The other top-of-the line program is TradeStation, but it costs big bucks to join and operate. Some people consider it the Cadillac of trading and technical analysis.

TerraNova is the home of the Day Trader, so they think nothing of you making several hundred trades a day. You don't have to do that, but it's okay here if you do.

(1) You do not have to wait until the end of the day to exercise a put option.

(2) If you exercise the option in the morning and the stock price closes over the strike price when the market closes you will only receive the strike price.

(3) You can avoid the situation in (2) by waiting until the end of the trading session to exercise the option.

(4) If the stock price is close enough to the strike price you will almost always make more money by selling the stock and selling the option instead of exercising the option.

Puts are exchange traded options; they are definately public as long as you are trading them. As a buyer of a put option, it gives you the right to sell your stock at a pre-determined price, called the exercise price.

For instance, if you own stock now selling at $10 each and want to protect your portfolio against losses, you could buy a put option. Say, your stop loss is 10% loss. You would either sell your stocks when they fall below $9 each. However, this would not guarantee a stop loss because every seller would be freaking out and wanting to sell these stock. So, the stock price might even fall to say $7 each, missing your stop loss.

To hedge against the extra loses, you would have bought put options that would give you a right to sell your stocks at $9 each regardless of how low the stock prices would fall.

Another way of benefitting from options would be to write a spread. At the moment, because the market is bearish, writing bearish call spreads would be the best way to make a lot of money. However, because these spreads are credit spreads, no broker would let you write the spread, without you having an amount of cash in your account, should your credit spread go wrong and your written options get exercised.

These strategies of write credit spreads are better left to more experienced investors. If you are fairly new at stockmarket inveting, I would suggest that you put your money in less volatile investment vehicles like fixed income stuff like savings bonds, CDs etc.

Thinkorswim.com open an account with $3500 and download the desktop. best broker firm and if you make 30 or more trades a month they will pay for you internet service! i daytrade with them and as long as you want to buy between bid and ask and place the order it gets you in instantly. $3 option trades. $5 stock trades up to 1000 shares .0125 cents per share after that. cant beat that! email me if you need some help too im always on the market M-F during market hours.

Day Trading refers to the practice of buying and selling financial instruments within the same trading day such that all positions will usually (not necessarily always) be closed before the market close of the trading day. Traders that participate in day trading are called day traders

Some of the more commonly day-traded financial instruments are stocks,stock options, currencies and a host of futures contracts such as equity index futures, interest rate futures, and commodity futures.

Day trading used to be the preserve of financial firms and professional investors and speculators. Many day traders are bank or investment firms employees working as specialists in equity investment and fund management. However, day trading has become increasingly popular among casual traders due to advances in technology, changes in legislation, and the popularity of the Internet.

I would actually say it is far better to day trade options than the underlying stock, for various important technical reasons.

www.optionetics.com is thorough, but expensive.

I'm not sure about specific courses but here are some links to websites that are known for proven stock and option trading tools. They have some courses you can sign up for.

www.investools.com

www.shadowtrader.net

www.thinkorswim.com

I use interactivebrokers.com because they are by far the cheapest, but they are not nearly as user friendly as most. Optionsxpress has great tools, virtual trading and good learning items but your at 9.99 on both sides of the trade. Ive also heard good things about think or swim, schwab, and scottrade too. It all depends on how much hand holding you need in your trading.

Good luck

Http://www.InteractiveBrokers.com