Automatic Contract Rollovers

I’ve noticed that prices slightly differ from brokerages and Im wondering if it’s due to contracts rolling over a few days before other platforms. For example, on NQ, the highs on July 11th and the lows on August 5th in TSX compared to Tradingview and ThinkOrSwim are not the same. This is a conflict when I am sharing technical analysis with other members who are on different platforms. Is there a reason why prices are not the same? Is it because of the early automatic contract rollovers?