[Python] Cannot trigger off the action in the "IF" statement for building up the trading bot...

I am trying to building up my trading bot by trying to validate "IF" statement below can be executed or not. I can see the price data was streaming in and the price moved up above 144 (USDJPY). However, I wonder why the "IF" statement cannot be executed. Anything wrong of my code? please help if anyone knows it. Thanks

from ib_insync import *
import pandas as pd
import numpy as np

util.startLoop()
ib = IB()
ib.connect(host='127.0.0.1', port=4002, clientId=1)

contract = Forex(pair="USDJPY")
ib.qualifyContracts(contract)

bars = ib.reqHistoricalData(
contract,
endDateTime="",
durationStr="1 D",
barSizeSetting="5 mins",
whatToShow="MIDPOINT",
useRTH=True,
keepUpToDate=True
)

if bars[-1].close > 144:
print("It's time to open a long position to USDJPY or close the short position")

if bars[-1].close < 143.75:
print("It's time to open a short position to USDJPY or close the long position")


enter code here

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