Limit order: A limit order differs from a market order in that the trade is only completed at a certain price. For example, if you enter an order to buy 10 shares of Nike at $70 each, the order will only go through if the broker can fill at it at a price of $70 per share. Limit orders are a good way to buy and sell stocks that trade less frequently, since there may not be enough willing sellers to fill a market order at a reasonable price. They are also good for stocks that you feel are too expensive right now, but that you'd be willing to buy if the price dropped. These orders are a good for "set and forget" investing, since you can place a limit order that will remain in effect until a stock reaches the price at which you'd like to buy.
Whatever happens on a stock exchange and no matter how much influence computers, algorithms and high frequency trading may have, human nature will always have an important role to play. Typically, human nature becomes more important when momentum is changing and there is excitement or panic in the air. It would seem wise to try and understand this mass psychology or group thinking which is often referred to by investors as the madness of crowds.

The reality is that in the modern world - especially with the power of the internet - there is very little information that is not in the public domain somewhere. However, the world now has information overload. Whilst the information might be available, few people now have the time to find or understand it. The people who know these things and can 'join the dots' have regular opportunities for stock market investment.
Even when the stock price has performed as expected, there are questions: Should I take a profit now before the price falls? Should I keep my position since the price is likely to go higher? Thoughts like these will flood your mind, especially if you constantly watch the price of a security, eventually building to a point that you will take action. Since emotions are the primary driver of your action, it will probably be wrong.
Risk tolerance is also affected by one’s perception of the risk. For example, flying in an airplane or riding in a car would have been perceived as very risky in the early 1900s, but less so today as flight and automobile travel are common occurrences. Conversely, most people today would feel that riding a horse might be dangerous with a good chance of falling or being bucked off because few people are around horses.
If there are any lessons to be learned from the American sub-prime mortgage crisis, the 2008 stock market crash (information here) and Wall Street bailout that followed - and there are lots of lessons - it is that borrowed money can be very dangerous in investments, even when it is being handled professionally. The failure of LTCM, Bear Stearns, Lehman Brothers, Northern Rock and many others shows just how precarious a business model can be with too much gearing.
Buy in thirds: Like dollar-cost averaging, “buying in thirds” helps you avoid the morale-crushing experience of bumpy results right out of the gate. Divide the amount you want to invest by three and then, as the name implies, pick three separate points to buy shares. These can be at regular intervals (e.g., monthly or quarterly) or based on performance or company events. For example, you might buy shares before a product is released and put the next third of your money into play if it’s a hit — or divert the remaining money elsewhere if it’s not.

Experienced investors such as Buffett eschew stock diversification in the confidence that they have performed all of the necessary research to identify and quantify their risk. They are also comfortable that they can identify any potential perils that will endanger their position, and will be able to liquidate their investments before taking a catastrophic loss. Andrew Carnegie is reputed to have said, “The safest investment strategy is to put all of your eggs in one basket and watch the basket.” That said, do not make the mistake of thinking you are either Buffett or Carnegie – especially in your first years of investing.
Trading platforms are portals through which users access and manage their trading accounts for their financial markets. This helps the users maintain their accounts. Generally, such platforms are offered by brokers in exchange of some fee or discounts on trade commissions. With the advent of the discount broking industry, several platforms are also available for free or rather, access to platforms is included in the brokerage you pay. These platforms can be used to conduct research, keep a track of various financial products you wish to trade in, place orders, store your past trade details as well as to authenticate users. Trading platforms have opened up the possibility of e-trading or online trading.