Fibonacci
Fibonacci Fans use Fibonacci ratios based on time and price to construct support and resistance trendlines; also, Fibonacci Fans are used to measure the speed of a trend's movement, higher or lower.
The chart below of the S&P 500 exchange traded fund (SPY) shows an uptrend that retraced to the 38.2% Fibonacci Fan:

The Fibonacci ratio is also used to predict areas of time in which price should change course; Fibonacci Time Extensions are discussed next.
INTRADAY STOCK TIPS