Key Takeaways. Price by volume ... The following chart shows an example of the SPDR S&P 500 ETF ... The offers that appear in this table are from partnerships from which Investopedia receives ...

What Is the Gartley Pattern? The Gartley pattern is a harmonic chart pattern, based on Fibonacci numbers and ratios, that helps traders identify reaction highs and lows. In his book Profits in the ...