There is an additional rule for trading when the market state is more favourable to the system. This rule is designed to filter out breakouts that go against the long-term trend. In short, you look at the 25-day moving average (MA) and the 300-day moving average. The direction of the shorter moving average determines the direction that is permitted. This rule states that you can only go:
Many forex traders start with a simple trading strategy. For example, they may notice that a specific currency pair tends to rebound from a particular support or resistance level. They may then decide to add other elements that improve the accuracy of these trading signals over time. For instance, they may require that the price rebound from a specific support level by a certain percentage or number of pips. 

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The EUR/USD 10 minute above shows a typical example of a scalping strategy. The long-term trend is confirmed by the moving average (price above 200 MA). The smaller time frame is then used to target entry/exit points. Timing of entry points are featured by the red rectangle in the bias of the trader (long). Traders can also close long positions using the MACD when the MACD (blue line) crosses over the signal line (red line) highlighted by the blue rectangles.
Some of these factors include political stability, interest rates, inflation, terms of trade, public debt and current account deficits. For example, in the case of interest rates, if rates are higher, lenders get a better return compared to those in a country with lower rates; therefore the higher rates attract foreign capital which causes the exchange rate to rise. This is one of the reasons forex traders may look to trade on interest rate announcements from central banks like the US Federal Reserve or the Bank of England.  
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.

Strong trending markets work best for carry trades as the strategy involves a lengthier time horizon. Confirmation of the trend should be the first step prior to placing the trade (higher highs and higher lows and vice versa) – refer to Example 1 above. There are two aspects to a carry trade namely, exchange rate risk and interest rate risk. Accordingly, the best time to open the positions is at the start of a trend to capitalise fully on the exchange rate fluctuation. Regarding the interest rate component, this will remain the same regardless of the trend as the trader will still receive the interest rate differential if the first named currency has a higher interest rate against the second named currency e.g. AUD/JPY.

What happens when the market approaches recent lows? Put simply, buyers will be attracted to what they regard as cheap. What happens when the market approaches recent highs? Sellers will be attracted to what they view as either expensive, or a good place to lock in a profit. Therefore, recent highs and lows are the yardstick by which current prices are evaluated.