Fair Value strategy made use of in various financial markets. In the forex market, the fair value of a currency is determined based on the economic situation in a country. In order to use this forex strategy, traders must have an understanding about a few basic related to the economy, especially the GDP growth of the two economies whose currencies they plan to buy and sell. Other aspects to be considered include the unemployment rate and the inflation data.
Risk Disclosure Statement: Trading currencies on margin involves a high level of risk which may not be suitable for all investors. Leverage can work against you just as easily as it can work for you. Before deciding to trade currencies you should carefully consider your trading and financial objectives, level of experience, and appetite for risk. The possibility exists that you could sustain a loss of some, or possibly all of your trading capital. Therefore, you should not fund a trading account with money that you cannot afford to lose. It is recommended that you seek advice from an accredited financial advisor if you have any doubts as to whether currency trading is right for you. No representation or guarantee is offered or implied as to the trading results that may be attained by applying concepts presented herein. Any losses incurred by traders unsuccessful in applying these ideas or methods are the sole responsibility of the trader and Currex Investment Services Inc (d.b.a “Forexmentor”) and its principals, contractors and assigns will be held safe from prosecution in any form.

Arbitrage is based on the premise of the forex trader trying to make a gain from small differences (of the currency) that exist either in the same or different markets. This is primarily a form of speculation. Identifying the right conditions and employing this strategy is not an easy task. Arbitrage strategy best market participants who have best technology systems and have quickest access to information. Arbitrage is best employed when the same currency has two different prices.
For example we have 2 really popular free systems (3 Pigs and PAST).  Many people are successful using them adapted to their own style of trading.  It is highly likely not one of them would ever have the exact same entries as we (the authors) do but they can and will be as successful by using and applying the principles in a manner suitable to them.  E.g. one of the strategies is a 4 Hour MTF strategy where the original system states a Trailing Stop based on an MA with an open Target.  One trader is now using this very successfully (and reports the trades on Babypips) us...

Trend-following systems require a particular mindset, because of the long duration—during which time profits can disappear as the market swings—these trades can be more psychologically demanding. When markets are volatile, trends will tend to be more disguised and price swings will be greater. Therefore, a trend-following system is the best trading strategy for Forex markets that are quiet and trending.