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

# TrackerTypes

[Git Source](https://github.com/forte-service-company-ltd/forte-rules-engine/blob/1f7450a94147e76e3930c235a18534779130abee/src/engine/RulesEngineStorageStructure.sol)

Supported Tracker Instruction Set Retrieval Types. This is used to tell the engine where to pull the tracker data from.

```solidity
enum TrackerTypes {
    MEMORY,
    PLACE_HOLDER
}
```