Bitcoin/Litecoin Ticker Alarm is a free Chrome add-on that provides real-time price updates for popular BTC/LTC trading exchanges. It allows users to stay informed about the latest prices and set alerts for when the price exceeds a certain value.

This add-on supports multiple exchanges, including Huobi, OKCoin, BTCChina, Bitstamp, Bitfinex, and BTC-E. The prices are displayed as a badge over the extension icon, which is refreshed every 15 seconds.

One of the standout features of Bitcoin/Litecoin Ticker Alarm is its alarm function. Users can set high and low price alerts through the options page of the extension. When the price surpasses the set threshold, the add-on plays a sound to notify the user.

Bitcoin/Litecoin Ticker Alarm is a simple and convenient tool for cryptocurrency enthusiasts who want to stay updated with the latest prices and be alerted when the price reaches certain levels.

Please note that this extension is based on ryaneof's simple-bitcoin-ticker, with the addition of the alarm function.