Tokens

The picker is a list plus a free contract address. Known tokens include ETH (native), WETH, USDG (6 decimals), 🚀 (18 decimals), and official stock tokens when a pool exists. A pasted address is used as an ERC-20. The symbol is not checked for uniqueness. The address is the identity.

Native and wrapped

ETH is the chain coin. It is not an ERC-20, so a TWAP sell uses WETH. Wrapping and unwrapping can appear as a hop in a swap route, next to the pool hop. WETH is 0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73.

Balances

The balance under a token is balanceOf for that account, or the native balance for ETH. A dollar figure is a quote, not a balance. A very small amount can show a dash instead of a price. That is display, not a zero balance.