> ## Documentation Index
> Fetch the complete documentation index at: https://docs.archr.win/llms.txt
> Use this file to discover all available pages before exploring further.

# Trading overview

> Every Archr coin trades on a plain Uniswap V3 pool (1% fee tier, single-sided at launch, no bonding curve, no graduation). How prices discover and where to swap.

Every coin launched on Archr trades on a standard [Uniswap V3](https://docs.uniswap.org/contracts/v3/overview) pool paired against WETH. If you can swap on Uniswap V3, you can swap on Archr.

## The pool

Every Archr pool has the same shape at launch:

| Field         | Value                                                                                                          |
| ------------- | -------------------------------------------------------------------------------------------------------------- |
| Pair          | `(WETH, Coin)`                                                                                                 |
| Fee tier      | **1%** (`fee = 10000`)                                                                                         |
| Tick spacing  | **200**                                                                                                        |
| Initial LP    | The entire 1B coin supply, single-sided, above the launch tick                                                 |
| Buy-side WETH | 0 at launch (buyers bring the ETH)                                                                             |
| LP owner      | The launcher factory contract, [permanently locked](/reference/faq#is-the-liquidity-really-permanently-locked) |

This is the "single-sided sell wall" model: the pool is created with only the coin side seeded. The first buyer trades ETH into the pool and gets coin back, which pushes the price up through the tick range. Each subsequent buyer pays a higher marginal price than the last.

## How price discovers

The pool prices as any V3 pool from block one: `sqrtPriceX96` at the launch tick, moving up as coin flows out. There is no bonding curve, no graduation event, no "phase 1 vs phase 2." Every buy and sell trades against the same locked LP position, and the fee-per-swap goes straight into the position's fee bucket.

Traders on the sell side (holders who bought earlier, want to exit) fill the "buy side" of the pool as they sell. The pool accumulates WETH from their sales, and later buyers face a mixed WETH+coin book like any V3 pool that has seen two-sided flow.

## Fees

A **1% fee** is taken on every swap, added to the LP's fee bucket. Because the LP position is locked forever, the fee bucket is the only value that can ever leave the position. See [ARCHR fee-flywheel](/earn/archr-flywheel) for how those fees get recycled. From the trader's perspective, the 1% is a normal V3 fee, and every V3 aggregator will quote it correctly.

There is no separate protocol fee at the trade level.

## Where to swap

Every coin's page at [`archr.win/token/<address>`](https://archr.win) has a built-in swap widget wired to `SwapRouter02` on 4663. It handles the WETH wrap/unwrap and the slippage check for you.

Because the pool is a plain V3 pool, anything on 4663 that speaks V3 also works:

* The canonical [Uniswap V3 SwapRouter02](/network/contracts#uniswap-v3-swaprouter02) at `0xCaf681a66D020601342297493863E78C959E5cb2`.
* Any aggregator or wallet that supports 4663 and V3 pools.
* Direct `exactInputSingle` / `exactOutputSingle` calls from a smart contract or script.

## Slippage

The swap widget's default slippage tolerance is picked to catch normal V3 volatility on 4663. If your swap reverts with a slippage error, raise the tolerance or wait for the pool to settle. For very large trades, split into smaller pieces to reduce marginal price impact.

## Verifying a coin before you buy

Anyone can launch anything, and there is no global uniqueness check on name or symbol. Before you buy:

1. Verify you have the right **contract address**; do not trust the symbol alone. Coins are found by address, either from the trigger reply (Reddit / X) or the coin's page URL on `archr.win`.
2. Open the coin on [Blockscout](https://robinhoodchain.blockscout.com) and confirm the fixed supply is `1,000,000,000e18` and that the LP NFT for its pool is held by one of the [Archr launcher contracts](/network/contracts). That is the "liquidity is locked" invariant.
3. See [risks](/reference/risks) for what platform-locked LP does **not** protect you against (market risk, price manipulation, coin-specific launcher intent).