Fumgo does not limit the amount of transactions and does not require a deposit to start trading. It is a trading terminal, not a broker.
The transaction is limited only by the size of the minimum order that exchanges allow, on average it is about $10. When you are creating an order on Fumgo, the terminal will tell you whether the exchange will allow your order.

I would like to draw your attention that you do not need a deposit on the platform to start trading. You need to connect your account with balance on one of the available exchanges (Binance, Bittrex, Bitfinex, Huobi Global, Okex, HitBTC, CEX.io) with API-keys.