Poloniex has a PUSH API, check their API FAQ here: https://poloniex.com/support/api/
The other API requests they have said to have 6 request/sec rate limitation, which in my opinion is still pretty close to real-time if you update the Ticker this way.
Kraken does not provide PUSH API, from their FAQ it looks like a normal user (Tier 2) has a limitation on ...
There are two possible actors that may build a ticker: exchanges and observers.
Exchanges actually perform trades on their platform so they'll likely be using the last price a trade was performed as the current price.
Observers do not trade themselves and will have to rely on exchanges to get the raw data on trades. They'd then pick the last trade price ...
CoinGecko has a free and public cryptocurrency API to obtain crypto prices from exchanges. It currently covers over 7000+ coins from 400+ exchanges.
You can fetch individual ticker data for an exchange with this endpoint for example
Where does it get its data?
It gets it from the APIs of those exchanges. For example, here's the Coinbase/GDAX API for order book information: https://docs.pro.coinbase.com/#get-product-order-book
AFAIU all the bitcoin transactions inside an exchange are just bookkeeping they do and the only real blockchain-recorded transactions are when you send bitcoin ...
I use bitcoinwisdom which in the market section has multiple exchange ratios for BTC/LTC/DOGE and for fiat money like USD/EURO/RUB.
Another option is this page in cryptocoincharts which also has many market prices for cryptocurrencies.
PubNub MtGox API Ticker Repeat Messages
The Ticker Events are Updates that are streamed directly to you which may or may not represent a price change. However the ticker updates are typically tied to a trade event which occur on the trade channel.
You can find the trade stream here:
That’s the market depth and it’s not related to bitcoin, any exchange of any asset provides this information. One way to interpret it is if someone sent a big market sell order of 22.542 BTC to this exchange, the price would drop to $52554.
There is not a way around this unless you are using an exchange. But, even exchanges have a disclaimer:
Market orders may be partially filled at several prices. Each part of
your order will be shown in the fills panel. See Coinbase Pro - overview of order types
The way exchanges work is sellers place limit orders, which show up on the order book. When ...
BTC_ETH is the exchange information between Bitcoin and Ethereum. In your example, 1 Ether buys about 8% of a Bitcoin.
The volume is given in both BTC and ETH terms.
baseVolume says 2206 BTC have been traded against ETH (last 24h I think)
quoteVolume says 28000 ETH have been traded against BTC
If you want a price in USD you can check the BTC_TUSD ticker, ...
Its common for sites to measure coins in milli- or micro-bitcoins, one milli-bitcoin is a thousandth of a bitcoin while a micro-bitcoin is a millionth of a bitcoin.
1 BTC = 1,000,000 µBTC (micro-bitcoin)
1 BTC = 1,000 mBTC (milli-bitcoin)
1 µBTC = 100 Satoshi
I'm not sure what website you are using, but I would hesitate a guess that those "credits" are ...
For each period:
The opening price is the price of the first trade that occurs within the period.
The closing price is the price of the last trade that occurs within period.
Note that the last trade in the 1st period is not equal to the first trade in the 2nd period.
Since these trades are different, their prices can and usually are different.
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 ...