I also have a problem with stocks.exchange I have deposited an erc20 token yesterday until now I have not arrived at my wallet or pending deposit but my transfer token is still a success.
I made ticket support but no response from developer ... I think there is a problem with stocks.exchange
I think have the system problem in the blockchain do not worry it might be having transactions traffic maybe have many more transaction, or what other reason be patience surely if sent it in the right address soon your funds completely arriving.
have same experience last time I transfer the fund came from erc2.0 more than 24 hours before the completely confirm arriving my funds.