Zoom in, Zoom Out and CFD Step by Step Buttons on MT4 Charts
Zoom In
This option is located on the charts menu within the MT4 Platform. This option is used to zoom in the charts as displayed below, some traders may select to magnify a chart and trade when the charts are zoomed in depending on the preference of a trader.
ShortCut Keyboard Key (+)
Zoom in The Candlesticks on the MetaTrader 4 Platform
Zoom Out
This option is located within the menu as shown below: this option is used to zoom out charts and is used by traders who prefer to trade the chart using minified charts according to their preference. This option is shown below.
Short Cut Keyboard Key (-)
Zoom out the Candlesticks in MT4 Platform
CFDs Step by Step
This option is used to back test systems by moving the charts one candlestick at a time & then analyzing when to buy and when to sell a instrument depending on the system being back tested. To learn and know more about this button key, Read the guide: Back testing a System using MT4 CFD Step by Step Button - its short-cut is key is "F12"
CFD Step by Step button for moving Charts One Candlestick at a Time