Hi i am new to Quanconnect and this concept of quant trading. I am having this trouble whenever i run a backtest. No trades are bing executed and everything remains 0. ( fees , net equity etc. etc.) even when i'm just backtesting other people codes which are posted in the forum.

The code that i'm currently testing with:

from clr import AddReference
AddReference("System")
AddReference("QuantConnect.Algorithm")
AddReference("QuantConnect.Common")

from System import *
from QuantConnect import *
from QuantConnect.Algorithm import *
import numpy as np

class BasicTemplateAlgorithm(QCAlgorithm):
    def Initialize(self):
        self.SetStartDate(2015,1, 1)  #Set Start Date
        self.SetEndDate(2017,12,31)    #Set End Date
        self.SetCash(1000)           #Set Strategy Cash
        self.AddForex("EURUSD", Resolution.Hour, Market.Oanda)
        self.SetBrokerageModel(BrokerageName.OandaBrokerage)
        sma_20 = self.SMA("EURUSD", 20, Resolution.Hour)
        sma_50 = self.SMA("EURUSD", 50, Resolution.Hour)
        
    def OnData(self, data):
        
        sma_20 = self.SMA("EURUSD", 20, Resolution.Hour)
        sma_50 = self.SMA("EURUSD", 50, Resolution.Hour)
        
        if self.Portfolio["EURUSD"].Invested<=150 and sma_20 > sma_50:
            self.MarketOrder("EURUSD", 1000)
            
        if sma_50 > sma_20:
            self.Liquidate()