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

# Good After Time

> Programmatic orders that activate after a specified timestamp with optional price validation.

# Good After Time Orders

Good After Time (GAT) orders are programmatic trades that remain dormant until their `startTime` is reached, functioning as scheduled executions with optional price validation.

## Core Mechanics

### Time-Based Activation

Orders activate only after a specified timestamp and expire at an `endTime`. The system returns `PollTryAtEpoch(startTime)` if execution is attempted too early.

### Balance Protection

The `minSellBalance` parameter ensures sufficient token availability, preventing execution after funds have been withdrawn or the order has already filled.

### Dynamic Buy Amounts

The off-chain input accepts varying `buyAmount` values, meaning different `buyAmount` values create different `orderUid`s, allowing multiple fills of the same order.

## Price Validation

Optional Milkman price checkers validate that provided buy amounts meet minimum requirements. The acceptable minimum calculates as:

```
expectedOut * (10000 - allowedSlippage) / 10000
```

Where slippage uses basis points (100 bp = 1%).

## Key Parameters

| Parameter                | Description                                       |
| ------------------------ | ------------------------------------------------- |
| `sellToken` / `buyToken` | Token pair for the trade                          |
| `receiver`               | Destination address for purchased tokens          |
| `startTime` / `endTime`  | UNIX timestamps controlling order validity window |
| `allowPartialFill`       | Whether solvers can execute partial quantities    |
| `priceCheckerPayload`    | ABI-encoded validation rules (optional)           |
| `minSellBalance`         | Minimum balance required to execute               |

## Order Structure

The implementation uses `GPv2Order.Data` structures integrated with `ComposableCoW`'s programmatic order framework, enabling sophisticated DeFi automation patterns with time-based constraints and price protections.