can't speak to candlesticks, never used them and you haven't said in what way they're
different but i did compare Oanda's 10 sec chart with NinjaTrader's tho the instruments
are different - 6E v eurusd and discovered the w 1-2 of a new rally was larger on Oanda
which i attributed to greater volume, not sure if such is seen on 1 min charts
there'll be a difference if pipettes are/not displayed on the chart - 5 v 4 decimal places -
variable v fixed spread, or just the variance in the spread between brokers
there's often a difference on the D OHLC prices