moving forward / backward 1 candle at a time

Trying to do some backtest in cTrader. When moving the chart with arrow keys, I noticed the chart moves 2 candles at a time whether it's left/right or up/down keys. I want to be able to scroll with keyboard 1 bar at a time, it'd make backtesting so much easier. In MT4 we can do it with F12

Currently can do this with mouse but it's very tiring and annoying

Thanks.