If you are trading currency mainly EUR/USD consider taking a look at the gold or XAU volatility as many traders found that whenever XAU (gold) is high Dollar or USD is down and vice and versa. This is not always the case as some studies suggest that whenever there is a breaking news this hypotheses breakdown.
Keep an eye on breaking news and on XAU as well, whenever trading EUR/USD. German yields and US yields also matters in how to trade currency on the long run. Do regular Fibonacci to predict recent future of the market trend.
Trading EUR/USD is a profitable and the same time risky as many traders lose money on the forex market. Forex is a low volatile market compared to oil or indices, however that does not mean that it is a risk-free market. Only trade what can you afford to lose.
Trader sentiment suggest that whenever the market is bullish or bearish studying the trend where the market will crossover will make you a profitable trader.