How can I find API (json data) for cryptocoins current ask/high/low/average price. Is there any website that provides that ticker information for all coins.
For example BTC/LTC ticker info is available in https://btc-e.com/api/2/ltc_btc/ticker
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Im not able to comment, thats why I am answering it, in addition to reiven's answer. Bitcoinwisdom is indeed a very good site to watch the BTC trend, and you can watch different markets against different currencies. However, there are even more markets you can see. For example the site for the Blackcoin vs Bitcoin market on mintpal is the following. The Dogecoin vs Bitcoin on crypsty is this one.