Consider using a data provider like Quandl or FXCM's historical API for detailed market data. Alternatively, export tick data from platforms like MetaTrader or NinjaTrader to manually analyze price movements following news releases for precise insights.
To trade Forex on news, you will need both quick access to information and the ability to correctly interpret events and make informed decisions. After all, the price can first go in one direction, and then suddenly turn around and move in the opposite direction, knocking out stop losses for both buyers and sellers, which makes such movements difficult to predict. Also, the news does not always cause the expected reaction or the market can already play out the news in advance.