diff --git a/MEV_on_Ethereum/README.md b/MEV_on_Ethereum/README.md
index fa544c2..7ea33ad 100644
--- a/MEV_on_Ethereum/README.md
+++ b/MEV_on_Ethereum/README.md
@@ -1,42 +1,35 @@
-# 🏴‍☠️ everything mev in ethereum
+# 🏴‍☠️ mev on ethereum
 
 <br>
 
-## mev categories
+#### basics
 
 <br>
 
-* arbitrage
-* liquidation
-* sandwich  
-* longtail
 
-<br>
-
----
-
-## in this repo
-
-<br>
-
-* [basic evm](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/evm-knowledge.md)
-* [frontrunning](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/frontrunning.md)
-* [liquidation](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/liquidations.md)
 * [arbitrage](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/arbitrage.md)
+* [basic evm](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/evm-knowledge.md)
 * [eip-1559](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/eip-1559.md)
-* [sandwiching](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/sandwiching.md)
 * [the mempool](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/mempool.md)
 * [terminology](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/terminology.md)
 
+<br>
 
+####  mev categories
 
 <br>
 
----
-
-## research
+* [frontrunning](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/frontrunning.md)
+* [liquidation](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/liquidations.md)
+* [sandwiching](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/sandwiching.md)
 
 <br>
 
-* [cross-domain mev](https://arxiv.org/abs/2112.01472)
+#### useful
+
+
+* [mev relays](https://github.com/bt3gl-labs/1337_mev_toolkit/blob/main/MEV_on_Ethereum/mev-relays.md)
+
+
+