Tick

Tick is one change of the price on the market.

The information about the tick includes:

• Bid Price
• Ask Price
• Date and time (up to milliseconds) when the price occurred on the market.

The price of the most recent tick usually can be used to execute a market order. The price usually expires when the next tick appears.

The tick usually appears when a deal occurs on the market and is a reaction of the market on changes of demand and supply.

On a fluent hundreds of ticks may occur during just one minute, so, "raw" ticks are rarely used to analyze the market. Analysts usually aggregates ticks into OHLC bars to simplify the analysis and remove the small fluctuations on the market.