Different OHLC values graph/API

When i call https://fapi.binance.com/fapi/v1/indexPriceKlines?symbol=BTCUSDT&pair=BTCUSDT&interval=1m I receive a values (for OHLC) which are different from the graph (futures BTC) shown in Binance. What am I doing wrong?
Example: The graph shows for O=42055 and API returns 42871.


I am guessing you are actually looking at the klines instead of the index price klines on the UI.