On the New Order form (for Trading) and on the Withdrawal form, symbols ($, €, ₿, etc) cannot be used anywhere.
Also if you use decimal values, be aware that:
- There has to be a number before the decimal place.
- Must use dot decimal separator, not a comma decimal separator.
For trading specifically, also keep in mind Price and volume decimal precision.
For withdrawals specifically, also keep in mind:
- Withdrawal minimums
- Common reasons for being unable to withdraw cash
- Common reasons for being unable to withdraw cryptocurrencies