Source: https://watch.fincobra.com/docs/evm-wallets.html


# EVM Wallet Tracking

Track your Ethereum, Arbitrum, and BSC wallets by pasting your address. FinCobra monitors token balances and calculates unrealized PnL from known acquisition costs and matched transfers.

## Supported Chains

| Chain           | Tokens Tracked      |
| --------------- | ------------------- |
| Ethereum        | ETH + ERC-20 tokens |
| Arbitrum        | ETH + ERC-20 tokens |
| BSC (BNB Chain) | BNB + BEP-20 tokens |

## How to Connect

Paste your `0x` wallet address — that's it. The connection is completely **read-only**. A wallet address can only be used to view balances and transactions on-chain.

## How PnL Works

Supported tokens use weighted-average acquisition cost. A matched transfer between connected accounts carries that cost to its destination. Current holdings with known cost contribute to unrealized PnL.

External receipts without a matched source use historical market value at entry to the tracked portfolio. Token identity must match a supported contract; a matching symbol alone is insufficient.

See [How PnL Works](./how-pnl-works.md) for the calculation and data requirements.

## Coverage

Indexing limits can leave history incomplete. Failed or partial balance reads do not count as sales. PnL is unavailable when current quantities cannot be reconciled with the accounting history.