sorry I misunderstood your question, i dont know if there is any other broker who allows you to trade on the weekend......
but not sure why anyone would actually want to execute a trade on the weekend bc the market is closed and oanda is taking on the risk, that is probably why the fking price is 2.5 dollars wide in what is normally a .30-.50 mkt
sounds like to me without knowwing any details, admittedly, that you are getting jacked.....