Can-you-point-me-to-the-most-basic-code-strategy-for-buying-on-SMA-crossover

CODE:
using WealthLab.Backtest;
using System;
using WealthLab.Core;
using WealthLab.Indicators;
using System.Drawing;
using System.Collections.Generic;

namespace WealthScript3 
{
    public class MACrossoverSample : UserStrategyBase
    {
      public MACrossoverSample()
      {
         AddParameter("Period 1", ParameterType.Int32, 10, 6, 20, 2);   // Parameter index 0
         AddParameter("Period 2", ParameterType.Int32, 21, 20, 30, 1);   // Parameter index 1
      }

        //create indicators and other objects here, this is executed prior to the main trading loop
        public override void Initialize(BarHistory bars)
        {
         _ma1 = SMA.Series(bars.Close, Parameters[0].AsInt);
         _ma2 = SMA.Series(bars.Close, Parameters[1].AsInt);

         PlotIndicatorLine(_ma1, WLColor.Gold);
         PlotIndicatorLine(_ma2, WLColor.Red );
         
         TimeSeries osc = _ma1 - _ma2;
         StartIndex = 50;

         PlotTimeSeries(osc, "Oscillator", "OSC", WLColor.Green, PlotStyle.HistogramTwoColor);
        }

        //execute the strategy rules here, this is executed once for each bar in the backtest history
        public override void Execute(BarHistory bars, int idx)
        {
            if (!HasOpenPosition(bars, PositionType.Long))
            {
            //code your buy conditions here
            if (_ma1.CrossesOver(_ma2, idx))
            {
               PlaceTrade(bars, TransactionType.Buy, OrderType.Market);
               
               //paint a light blue background on the signal bar
               SetBackgroundColorAllPanes(bars, idx, WLColor.FromArgb(40, WLColor.Blue));
            }
            }
            else
            {
            //code your sell conditions here
            Position p = LastPosition;
            if (_ma1.CrossesUnder(_ma2, idx))
               ClosePosition(p, OrderType.Market);
            }
        }

        public override void NewWFOInterval(BarHistory bars)
        {
         _ma1 = SMA.Series(bars.Close, Parameters[0].AsInt);
         _ma2 = SMA.Series(bars.Close, Parameters[1].AsInt);
        }

        SMA _ma1;
      SMA _ma2;
      RSI _rsi;

    }
}