# Decay System

The MMR Decay system ensures fair and competitive matchmaking rankings by gradually reducing the MMR of inactive players over time. This helps keep rankings accurate and reflective of current skill levels.

## Key Features

* **Inactivity Period**: MMR decay starts after a specified number of inactive days.
* **Decay Amount**: The MMR deduction can be a fixed value or a percentage of the player's current MMR.
* **Decay Intervals**: Decay occurs at regular intervals (e.g., every 14 days) and continues if inactivity persists.
* **Notifications**: Players receive a DM warning 1 day before their MMR decay begins.
* **Exemptions**: Admins can exempt players from decay for specific games or scenarios.

## How it Works

1. Use `/premium decay [game]` to open the MMR Decay menu and adjust settings.
2. Configure decay settings, including:
   * **Decay Amount**: Choose between a flat value or a percentage.
   * **Decay Intervals**: Define how long players in different MMR brackets can remain inactive before decay begins.
     * Example:
       * **1000+ MMR**: Decays after 20 days.
       * **2000+ MMR**: Decays after 10 days.
       * **3000+ MMR**: Decays after 5 days.
       * **4000+ MMR**: Decays after 3 days.
3. Save changes to apply the settings.
4. Players under **1000 MMR** will only decay after **365 days** of inactivity by default.

## Notifications and Logging

* Players receive a warning DM 1 day before decay starts.
* Decay events are logged in the Admin Log channel.
* Players continue to decay daily until they play a game to reset the timer.

This system ensures rankings stay dynamic, rewarding active players while encouraging consistent participation.

Find out how to set up MMR Decay [here](/docs/premium/premium-commands/tier-2.md#mmr-decay-system-)


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