/// <summary>
        /// Generate the leverage utilization plot using the python libraries.
        /// </summary>
        public override string Render()
        {
            var backtestSeries = Metrics.LeverageUtilization(_backtestPortfolios).FillMissing(Direction.Forward);
            var liveSeries     = Metrics.LeverageUtilization(_livePortfolios).FillMissing(Direction.Forward);

            var base64 = "";

            using (Py.GIL())
            {
                var backtestList = new PyList();
                var liveList     = new PyList();

                backtestList.Append(backtestSeries.Keys.ToList().ToPython());
                backtestList.Append(backtestSeries.Values.ToList().ToPython());

                liveList.Append(liveSeries.Keys.ToList().ToPython());
                liveList.Append(liveSeries.Values.ToList().ToPython());

                base64 = Charting.GetLeverage(backtestList, liveList);
            }

            return(base64);
        }