On chart trader, often, when change to order price made by dragging order level up down , the user may get unintended price level by unstable hand. 
Propose to add feature ,
after right click on the manual trade active order horizontal line,
a menu include choices to change order price pop up, 
with price change by 1 tick in range -10 to +10 and
an option to enter custom No of +/-tick or
entera numeric price level.