I believe none of the broker provided chart feeds adjust the look-back price history for each SPY quarterly dividend. Only Stockcharts uses div-adjusted look back price history as its default, although they added in recent years the ability to look at any symbol's price history NON div-adjusted as a user defined alternative to the default. This is the reason I consider only StockCharts for my reliable use of BB's and longer term MA's especially near the 3rd Friday of each quarterly quad witch when the Dividends are paid. I personally will not rely on trading directional reads based on price-calculated indicators or BB's that are not div adjusted. my 2c ... I am fine with using 16 hour all sessions price action for each day if trading some intraday swings based on 3 min and 15 min charts using: broker provided chart feed AND only when more than 3 days away from each side of the quad witch event.