Scalping - These are very short-lived trades, possibly held just for just a few minutes. A scalper seeks to quickly beat the bid/offer spread, and skim just a few points of profit before closing. This strategy typically uses tick charts, such as the ones that can be found in MetaTrader 4 Supreme Edition. This trading platform also offers some of the best forex indicators for scalping. In addition, the Forex-1 minute Trading Strategy can be considered an example of this trading style.

Forex strategies that are traded based on strict mathematical rules with no ambiguous conditions and no important trading decisions to be made by the trader are called mechanical. A good example of a mechanical system is a moving average cross strategy, where MA periods are given and positions are entered and exited exactly at the point of cross. When working with mechanical trading strategy, it is easy to backtest one and determine its profitability. You can also automate such system via MetaTrader expert advisors or any other trading software. The usual drawback of such strategies is their lack of flexibility before the fundamental changes in the market behavior. Mechanical strategies are a good choice for traders knowledgeable in trading automation and backtesting.
Price action Forex strategies are the currency trading strategies that do not use any chart or fundamental indicators but instead are based purely on the price action. These strategies will fit both short-term and long-term traders, who do not like the delay of the standard indicators and prefer to listen as the market is speaking. Various candlestick patterns, waves, tick-based strategies, grid and pending position systems — they all fall into this category:
When it comes to clarifying what the best and most profitable Forex trading strategy is, there really is no single answer. Here's why. The best FX strategies will be suited to the individual. This means you need to consider your personality and work out the best Forex strategy to suit you. What may work very nicely for someone else may be a disaster for you.

This forex trading strategy takes advantage of the momentum of the market that is currently prevalent. Any market sentiment is a sum total of all the traders’ prevalent sentiments. This ultimately results in the forex market moving in a specific direction. Market sentiment is a very important aspect and traders should learn to read or feel the same in order to successfully trade currencies. Sometimes it is easy to understand the sentiment, but some other it may not be very obvious.
Strategies that retain some uncertainty and cannot be easily formalized into mathematical rules are called discretionary. Such strategies can be backtested only manually. They are also prone to emotional errors and various psychological biases. On the bright side, discretionary trading is very flexible and allows experienced traders to avoid losses in difficult market situation, while offering an opportunity to extend profit when traders deem it feasible. Newbie currency traders should probably stay away from discretionary trading, or at least try to minimize the extent of their discretion in trading.

Apart from the entry/exit rules and optional money management guidelines, strategies are often characterized by the list of trading tools required to employ the given strategy. These tools are usually charts, technical or fundamental indicators, some market data or anything else that can be used in trading. When choosing a strategy, you need to understand, which of the required tools you have in possession.