Update QCAlgorithm.Plotting.cs (#4827)

Increased maximum number of series that can be plotted in backtest from 10 to 30

Co-authored-by: Emilio Freire <[email protected]>

Algorithm/QCAlgorithm.Plotting.cs

@@ -183,9 +183,9 @@ public void Plot(string chart, string series, decimal value)
                     ? i + c.Series.Values.Count(s => reservedSeriesNames.Count > 0 && !reservedSeriesNames.Contains(s.Name))
                     : i + c.Series.Count);
 
-                if (seriesCount > 10)
+                if (seriesCount > 30)
                 {
-                    Error("Exceeded maximum series count: Each backtest can have up to 10 series in total.");
+                    Error("Exceeded maximum series count: Each backtest can have up to 30 series in total.");
                     return;
                 }
 
@@ -337,4 +337,4 @@ public List<Chart> GetChartUpdates(bool clearChartData = false)
             return updates;
         }
     }
-}
+}