TRIX Indicator with period and signal length

I'm trying to figure if there is a way to create TRIX indicator by passing in both the period and signal length. From what I can see, the one that comes with LEAN only allows one parameter - the period. Is there a way to pass in both the period and signal length?

Here's a snippet

from AlgorithmImports import *

### <summary>
### EMA cross with SP500 E-mini futures
class Test(QCAlgorithm):

    def Initialize(self):
        self.SetStartDate(2022, 1, 1)
        self.SetEndDate(2023, 8, 18)
        self.SetCash(1000000)        
        slowPeriod = 200             
        self.SetWarmUp(slowPeriod)
    
        # Adds the future that will be traded
        self.future = self.AddFuture(Futures.Indices.MicroNASDAQ100EMini)
        self.future.SetFilter(lambda x : x.FrontMonth())
        self._slow = ExponentialMovingAverage(slowPeriod)
        self.trix1 = TripleExponentialMovingAverage(17)
        
        # Pointer to track front month contract
        self.frontmonthContract = None


    def OnData(self, slice):
        if self.IsWarmingUp: return

        for chain in slice.FuturesChains:
            # Trades bars for contracts in chain
            tradebars = chain.Value.TradeBars
            contracts = [contract for contract in chain.Value]

            # If front month contract is updated
            if self.frontmonthContract == None or contracts[0].Symbol != self.frontmonthContract.Symbol:
                # contracts has only 1 element, the front month contract
                self.frontmonthContract = contracts[0]

            symbol = self.frontmonthContract.Symbol

            # Update SMA with tradebar data
            price = 0
            if symbol in tradebars.Keys:   
                tradebar = tradebars[symbol]
                price = tradebar.Close
                self._slow.Update(tradebar.EndTime, tradebar.Close)
                self.trix1.Update(tradebar.EndTime, tradebar.Close)

            if self._slow.IsReady and self.trix1.IsReady:                
                if not self.Portfolio.Invested:
                    if price != 0 and price > self._slow.Current.Value:
                        self.MarketOrder(self.frontmonthContract.Symbol, 1)
                        self.Debug(f"Symbol: {symbol}, Expiry: {self.frontmonthContract.Expiry}, SMA: {self._slow.Current.Value}")

    

    def OnEndOfDay(self, symbol):
        self.Plot("Slow", self._slow) 
        self.Plot("trix", self.trix1)        

    def OnOrderEvent(self, orderEvent):
        self.Log(str(orderEvent))