after i closed a trade, on my demo account with oanda, that was successful (at least i think it was… it wasnt negative) i noticed that the account was still at 100,000.00 where it had started. am i missing something? Should it show profit or does the profit have to be big enough to actually recognize?
The demo should reflect the profit/loss after a trade is closed (even if it is a small amount). Maybe the trade is still open but you think it closed 
My guess is that you confused Oanda units with lots and traded 1 or 2 units.
That would make your profit about .00001 cents, and that’s why your account didn’t go up. 