protected override void OnBarUpdate()
{
    // Print out the number of enabled custom Performance Metrics
    Print("Number of Performance Metrics: "
        + SystemPerformance.AllTrades.TradesPerformance.PerformanceMetrics.Length);
 
    // Find a the value of a specific custom Performance Metric named "MyPerformanceMetric"
    for (int i = 0; i < SystemPerformance.AllTrades.TradesPerformance.PerformanceMetrics.Length; i++)
    {
        if (SystemPerformance.AllTrades.TradesPerformance.PerformanceMetrics[i] is
              NinjaTrader.NinjaScript.PerformanceMetrics.MyPerformanceMetric)
        {
              Print((SystemPerformance.AllTrades.TradesPerformance.PerformanceMetrics[i] as
                  NinjaTrader.NinjaScript.PerformanceMetrics.MyPerformanceMetric).Values[0]);
        }
    }
}