Issues following the script example for SystemPerformance

[drewclass34]

Hi guys, I'm pretty new to developing and am having trouble using the example from:

https://ninjatrader.com/support/helpguides/nt8/NT%20HelpGuide%20English.html?alltrades.htm

For example, I am trying to practice developing by creating a basic indicator that displays my daily and weekly PNL on the chart. But, whenever I use:

protected override void OnBarUpdate()
{
// Check if it's a new day
if (Time[0].Date > lastDailyReset)
{
dailyProfitLoss = SystemPerformance.AllTrades.TradesPerformace.Gross Profit;
dailyPNL = dailyProfitLoss; //Set daily PNL for the new day
lastDailyReset = Time[0].Date;
}
}

I end up getting CS0120 error. Am I supposed to create a reference to SystemPerformace?
I'm really confused so if anyone could help I would greatly appreciate it.

[NinjaTrader_Jesse]

Hello drewclass34,

The sample you are viewing is a strategy sample, that code can only be used in a strategy.

Indicators don't have any associated account or know about trades or account values by default. You can use the addon framework to monitor live account values from an indicator but it would not be the same as the strategies performance values which represent the isolated trades of that individual strategy.

To use the system performance values you would need to develop a strategy that places trades so it can populate its performance and then use that code in that strategy.