For some symbols the price ladder can be compressed, which means that ticks can be viewed in a quantity different from the exchange value.
Turn on the Compression button from the DOMTrader/Trading Preferences/Display
Then, click the compression button to turn compression on (orange background) and off (gray background).
You can set the amount of the compression next to the compression button.
If you do not see the compression button parameters click on the expansion arrow to the right.
Data is aggregated in the opposite direction of the market. Bids are aggregated down, and asks are aggregated up. The traded volume is aggregated to the closest visible price up. The daily high price is rounded up, and the daily low price is rounded down.
Actual ticks, and not compressed ticks, are used for the offset value for stop limit orders. Order types are also determined by actual ticks.
Orders with fixed prices are visible only if those price values match the compressed price value displayed.