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The Trader's Toolbox posts are just another free resource from MarketClub.
"MarketClub is known for our “Trade Triangle” technology. However, if you have used other technical analysis indicators previously, you can use a combination of the studies and other techniques in conjunction with the “Trade Triangles” to further confirm trends.
Williams’ %R oscillator, attributed to Larry Williams, is a variation of the stochastics indicator previously discussed. Because the two oscillators are essentially the same, only minor modifications to the formula are required. The formula for calculating %R is: %R = Hn – C / Hn – Ln where Hn = highest high of the period, C = Close of the current period and Ln = lowest low of the period..."
Revisit the Trader's Toolbox Post: "William's %R" here.