I am using this code to get data from a TEMA and add it to a rolling window of data.

TripleExponentialMovingAverage _tema; public override void Initialize()
{

//Start and End Date range for the backtest:
SetStartDate(2015, 1, 1);
UniverseSettings.Leverage = 0;
SetEndDate(DateTime.Now.Date.AddDays(-1));

//Cash allocation
SetCash(25000);


SetBrokerageModel(BrokerageName.FxcmBrokerage);
//AddForex("EURUSD", Resolution.Hour, Market.FXCM);
AddSecurity(SecurityType.Forex,"EURUSD", Resolution.Hour);

var hourlyConsolidator = new TradeBarConsolidator(TimeSpan.FromHours(30));

hourlyConsolidator.DataConsolidated += OnDataHourly;

SubscriptionManager.AddConsolidator("EURUSD", hourlyConsolidator);
}

//hourly data handler
private void OnDataHourly(object sender, TradeBar consolidated)
{
_eurusdHourly = consolidated;
var tema = TEMA("EURUSD", 17, Resolution.Hour);
}
public class TEMAState
{
public readonly decimal Current;
public TEMAState(TripleExponentialMovingAverage tema)
{
Current = _tema.ComputeNextValue("EURUSD", 17, Resolution.Hour);
}
}

I get an error for "Current = _tema.ComputeNextValue("EURUSD", 17, Resolution.Hour);"

"An object reference is required for a non-static field, method, or property, 'BasicTemplateAlgorithm._tema' "

Does anyone have any ideas to get what I want done?