Why is TradingView data different from TradeStation, Thinkorswim, or other platforms' data?

TradingView users must purchase data plans to get NASDAQ, NYSE, ARCA, etc., data feeds.  Some TradingView users believe that having a paid chart plan also includes data, but they are separate purchases for most market classes.  For more information on this, see the following support solution from TradingView's website:https://www.tradingview.com/support/solutions/43000471705-i-upgraded-to-a-paid-plan-but-my-data-is-delayed/ 

The "free" real-time Cboe One data feed that TradingView provides differs from other official feeds, as stated by TradingView.  These differences could be reflected in indicators, where you'll see different results in TradingView's implementation vs other platforms.  While there may be slight differences between the plotting of indicators from one platform to another, it's essential that they have the same source data if we're to expect the indicators to show the same data.  A paid data plan (in addition to any charting subscription) is required to get the data to match other platforms that use the official data feeds.