Biticker

Main features:
* Exchange rate ticker. Constantly shows the current exchange rate between two currencies of your choice, including Bitcoin (BTC or BCH), Monero (XMR), Ethereum, precious metals and fiat currencies. The ticker changes color to show climbing/diving price.
* Price conversions for all the supported currencies.
* Desktop notifications (with optional sounds) for when the ticker price exceeds some user defined bounds.
* Historical price graph for the selected ticker rate or any price conversion you calculate. Can be customized to show any 3rd party image-format graph that you want.
* See the current BTC difficulty in the ticker's tooltip.

Disclaimer: This extension is provided without any guarantee for the information that it shows. Please don't blame me if for some reason you lose money while using this extension. Prices might fail to update at any time for any reason so do not rely solely on this extension for getting critical information.