Max your leverage long or short flip a coin before the next high impact news release for whichever pair you can trade. https://www.dailyfx.com/calendar
If I assume this was your plan from the start then I should also assume you went with oanda because you wherent aware of a better choice which leads me to believe you are in the US? If so your max leverage is 20, so if you bet it all thats what...20 cents per pip? i dont think you are going to double it or lose it as quickly as you intended. Edit: no wait oanda is 50 leverage for US residents right? so about 50 cents per pip if you put it all down