Tick chart for AUDUSD, showing each change in the ask or bid price. (If the spread is very tight then the lines may overlap, and only the ask line may be visible.)
As well as a plain tick chart, you can use the "Tick speed" mode to add an indicator showing how long it has taken for the last N ticks to happen. The lower the histogram, the faster the market is moving.
The "Timed" mode still shows each change in the ask or bid price, but the X axis of the chart is set to constant units of time. You can use this to view individual ticks while still being able to distinguish between fast and slow periods in the market.
The "Candles" mode draws tick candles. These are candles which form each time that N ticks happen, rather than being time-based.
The AUDUSD currency pair is the abbreviation for the Australian dollar and U.S. dollar currency pair or cross. Trading this currency pair is also known as trading the "Aussie". The currency pair is one of the most aggressive currency pairs in the financial markets and is the sixth highest pair for trading in the world, accounting for around 7% of the worldwide currency trades annually. The pair is affected by factors that influence the value of the Australian dollar and/or the U.S. dollar in relation to each other and other currencies. This includes geographical factors such as the production of commodities (coal, iron ore, copper) in Australia, political factors such as the business environment in China (a major customer for Australian commodities), and interest rate influences. The interest rate differential between the Reserve Bank of Australia (RBA) and the Federal Reserve (Fed) will affect the value of these currencies when compared to each other.