Added XT reference

README.md

@@ -86,6 +86,7 @@ CryptoExchange.Net also allows for [easy access to different exchange API's](htt
 |Mexc|[JKorf/Mexc.Net](https://github.com/JKorf/Mexc.Net)|[![Nuget version](https://img.shields.io/nuget/v/JK.Mexc.net.svg?style=flat-square)](https://www.nuget.org/packages/JK.Mexc.Net)|
 |OKX|[JKorf/OKX.Net](https://github.com/JKorf/OKX.Net)|[![Nuget version](https://img.shields.io/nuget/v/JK.OKX.net.svg?style=flat-square)](https://www.nuget.org/packages/JK.OKX.Net)|
 |WhiteBit|[JKorf/WhiteBit.Net](https://github.com/JKorf/WhiteBit.Net)|[![Nuget version](https://img.shields.io/nuget/v/WhiteBit.net.svg?style=flat-square)](https://www.nuget.org/packages/WhiteBit.Net)|
+|XT|[JKorf/XT.Net](https://github.com/JKorf/XT.Net)|[![Nuget version](https://img.shields.io/nuget/v/XT.net.svg?style=flat-square)](https://www.nuget.org/packages/XT.Net)|
 
 When using multiple of these API's the [CryptoClients.Net](https://github.com/JKorf/CryptoClients.Net) package can be used which combines this and the other packages and allows easy access to all exchange API's.
 
@@ -133,6 +134,10 @@ A Discord server is available [here](https://discord.gg/MSpeEtSY8t). For discuss
 ## Support the project
 Any support is greatly appreciated.
 
+### Referal
+If you do not yet have an account please consider using this referal link to sign up:  
+[Link](https://advanced.coinbase.com/join/T6H54H8)
+
 ### Donate
 Make a one time donation in a crypto currency of your choice. If you prefer to donate a currency not listed here please contact me.