They have an "average" price ticker here:
https://localbitcoins.com/bitcoinaverage/ticker-all-currencies/You then just need to extract the data for the currency you want... like:
"USD": {"avg_12h": "9621.93", "volume_btc": "137.46286471", "avg_24h": "9670.23", "avg_1h": "9396.37", "rates": {"last": "12164.98"}, "avg_6h": "9831.19"}
About the Api on LBC, i dont get it how to use.
As per their documentation...
Before you start
The LocalBitcoins API is created for programmers who want to create applications to interface with LocalBitcoins. If you're not coming from a programming background you will probably have a difficult time understanding this guide. To help you get started with coding you can take a look at
Code Academy that offers free courses in coding.
If you don't know how to work with JSON formatted data, I'd suggest you investigate ways to extract info from JSON data using whatever system you're using (For instance, try googling "Open Office JSON") first... and after you're comfortable working with JSON, you can try and retrieve the data from LBC.