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## gmx oracle abuse
<br>
### tl; dr
<br>
### tl; dr october'22 event
<br>
* gmx differs from amms by offering zero slippage on trades via an oracle price update system, while amms like uniswap rely on arb bots to balance prices in the pools
* gmx team-run bots make calls to `SetPriceWithBit()` to update asset prices. mev operators can observe these prices updates in the mempool before land on chain.
<br>
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### resources
<br>
* [chainsight twitter](https://twitter.com/ChainsightLabs/status/1580208615654584321?s=20&t=-FG5kQ_7kAKhLnbuk05wSg)