Pocket Broker
Questions & Answers

Yes, they have some requirements, depending on the payment method you've chosen. It can vary from the lower at e-wallet to the higher at some crypto currencies and bank wires. The actual information, you can find at their cabinet, in deposits sections, where it`s all displayed what minimum and maximum for specific methods, too many methods, hard to remember them all.
As far as I know, the lowest starts from just $5, anyway don’t recommend such an amount, too risky and not profitable, if you consider trading serious activity, of course. So, in your case, I’d better focus on other things, rather than minimum deposit requirements,imho.