Chart not showing under daily resolution

The issue you're experiencing might be due to the way data is handled at different resolutions in QuantConnect. When you're using the Daily resolution, the OnData method is only called once per day at the end of the trading day. This means that the candlestick for the current trading day is not fully formed yet and hence might not be plotted.

However, when you're using Hour or Minute resolution, the OnData method is called multiple times throughout the trading day, allowing the candlestick to be updated and plotted in real-time.

Here is an example of how to plot a daily candlestick chart:

class ChartingDemoAlgorithm(QCAlgorithm):
 def Initialize(self) -> None:
 self.SetStartDate(2021, 1, 1)
 self.SetEndDate(2022, 1, 1)
 self.AddEquity("SPY", Resolution.Daily)
 chart = Chart("Price")
 self.AddChart(chart)
 chart.AddSeries(Series("SPY", SeriesType.Scatter, "$", Color.Green, ScatterMarkerSymbol.Triangle))
 chart = Chart("Candlestick")
 self.AddChart(chart)
 chart.AddSeries(CandlestickSeries("SPY", "$"))

 def OnEndOfDay(self, symbol: Symbol) -> None:
 self.Plot("Price", "SPY", self.Securities[symbol].Price)
 self.Plot("Candlestick", "SPY", self.Securities[symbol].GetLastData())

In this example, the OnEndOfDay method is used to plot the data. This method is called at the end of each trading day, which is when the daily bar is fully formed and ready to be plotted.

For more information, you can refer to the QuantConnect Documentation.