International parity conditions: Relative purchasing power parity, interest rate parity, Domestic Fisher effect, International Fisher effect. Though to some extent the above theories provide logical explanation for the fluctuations in exchange rates, yet these theories falter as they are based on challengeable assumptions [e.g., free flow of goods, services and capital] which seldom hold true in the real world.
There is nothing wrong with attempting intraday trading. The only thing you need to keep in mind is to never risk more than 2% of your trading capital on any trade. Traders can avoid significant losses in their trading if they trade with proper risk management in place. When day trading is backed by a trend and high volatility, you won't be late to discover trading opportunities and book your profits thereafter.
Now you know the what, the why, and the how of Forex trading. The next step to to create a trading strategy. For beginner traders, the ideal scenario is to follow a simple and effective strategy, which will allow you to confirm what works and what doesn't work, without too many variables confusing things. Fortunately, banks, corporations, investors, and speculators have all been trading the markets for decades, which means there is already a wide range of Forex trading strategies to choose from. These include: