This is Robert C. Miner's DT Oscillator, a version of the Stochastics & RSI. See his book, High Probability Trading Strategies There are four possible parameter combinations for this indicator: 8,5,3,3 Monthly,Weekly,Daily 13,8,5,5 Weekly,Daily,H4 21,13,8,8 Daily,H4,H1 34,21,13,13 H4,H1,M15