What is a ticker ?

A ticker, synonym for a stock symbol, is the short form of full security (asset) name. A ticker has a stream of quotes (AKA prices) attached to it, continuously updated throughout a trading session by the various exchanges.

For example, take ETH-BTC , if you have curl and jq installed, you can get a ticker from Kucoin with this command

curl -s https://api.kucoin.com/api/v1/market/orderbook/level1?symbol=ETH-BTC \
| jq .data

The result will look like this :

{
"time": 1597187421265,
"sequence": "1594340550066",
"price": "0.033131",
"size": "0.0013217",
"bestBid": "0.03313",
"bestBidSize": "2.1812529",
"bestAsk": "0.033131",
"bestAskSize": "2.8001025"
}

The first listed currency of a currency pair is called the base currency (ETH), and the second currency is called the quote currency. Price at 0.033131 means 1 Ether can be bought with 0.033131 Bitcoin.

These are the fields you can find on a ticker quote:

Field

Description

currencyPair

Currency pair

open

The opening price is the first trade price that was recorded during the day’s trading.

last

Last trade field is the price at which the last trade was executed.

bid

The bid price shown represents the highest price.

ask

The ask price shown represents the lowest price.

high

The day’s high price.

low

The day’s low price.

vwap

Volume-weighted average price (VWAP) is the ratio of the value traded to total volume traded over a particular time horizon (usually one day).

volume

Volume is the number of shares or contracts traded.

quoteVolume

Quote volume

bidSize

The bid size represents the quantity of a security that investors are willing to purchase at a specified bid price.

askSize

The ask size represents the quantity of a security that investors are willing to sell at a specified selling price.

timestamp

The moment at which the account information was retrieved.