Can a market maker influence market prices against a client’s position? Definitely not, because the Forex market is the nearest thing to a “perfect market” (as defined by economic theory) in which no single participant is powerful enough to push prices in a specific direction.

The MACD line is the difference between two exponential moving averages and the signal or trigger line, which is an exponential moving average of the difference. If the MACD and trigger lines cross, then this is taken as a signal that a change in the trend is likely.

Economic policy comprises government fiscal policy (budget/spending practices) and monetary policy (the means by which a government's central bank influences the supply and "cost" of money, which is reflected by the level of interest rates).