You can create candlestick charts using the "candle" function from the Octave Financial package, function reference is at https://octave.sourceforge.io/financia

You can create candlestick charts using the "candle" function from the Octave Financial package, function reference is at https://octave.sourceforge.io/financial/function/candle.html https://octave.sourceforge.io/financial/function/candle.html Also, extending with C++ is easy, see https://octave.org/doc/v4.0.1/Getting-Started-with-Oct_002dFiles.html#Getting-Started-with-Oct_002dFiles https://octave.org/doc/v4.0.1/Getting-Started-with-Oct_002dF...