https://doc.qt.io/qt-6.5/qcandlestickset.html
QCandlestickSet Class | Qt Charts 6.5.12
The QCandlestickSet class represents a single candlestick item in a candlestick chart.
classqtcharts
https://forum.qt.io/topic/87320/qcandlestickset-too-thick
QCandlestickSet too thick!! | Qt Forum
Feb 1, 2018 - Hi everybody, I am relatively new in QT... So I wondered if someone knows how to reduce the thickness of the candlesticks when they are painted in a QChart. ...
thickqtforum