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C H A P T E R Decode UCC  12 In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. UPCA Encoder In None Using Barcode generator for Software Control to generate, create UPCA image in Software applications. OscillatorBased Entries
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Printing UPCA Supplement 2 In Visual Basic .NET Using Barcode creator for .NET framework Control to generate, create UPC Code image in VS .NET applications. Data Matrix Encoder In None Using Barcode generation for Software Control to generate, create ECC200 image in Software applications. that describe oscillators appear quite frequently in such magazines as Technical and Futures. The subject is also covered in Most widely used, in both their classic forms and variations, are Appel s (1990) Moving Average Convergence Divergence (MACD) oscillator and MACDHistogram (MACDH). Also highly popular are Lane s Stochastic, and Williams s Relative Strength Index (RSI). Many variations on these oscillators have also appeared in the literature. Other oscillators include Lambert s Commodities Channel Index (CCI), the Random Walk Index (which might be considered an oscillator), and Goedde s (1997) Regression Channel Oscillator. In this chapter, the primary focus is on the three most popular oscillators: the MACD, Stochastic& and the RSI. Code 3 Of 9 Printer In None Using Barcode encoder for Software Control to generate, create USS Code 39 image in Software applications. Encode EAN13 Supplement 5 In None Using Barcode generator for Software Control to generate, create EAN13 image in Software applications. WHAT IS AN OSCILLATOR
Barcode Printer In None Using Barcode printer for Software Control to generate, create barcode image in Software applications. Barcode Generation In None Using Barcode creation for Software Control to generate, create barcode image in Software applications. An oscillator is an indicator that is usually computed from prices and that tends to cycle or oscillate (hence the name) within a fixed or fairly limited range. Oscillators are characterized by the normalization of range and the elimination of longterm trends or price levels. Oscillators extract information about such transient phenomena as momentum and overextension. Momentum is when prices move strongly in a given direction. Overextension occurs when prices become excessively high or low ( overbought or oversold ) and are ready to snap back to more reasonable values. 2/5 Interleaved Generation In None Using Barcode creator for Software Control to generate, create 2/5 Interleaved image in Software applications. Bar Code Encoder In Java Using Barcode generation for Android Control to generate, create bar code image in Android applications. KINDS
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Generate Bar Code In Java Using Barcode creator for Android Control to generate, create barcode image in Android applications. Paint GTIN  12 In ObjectiveC Using Barcode drawer for iPhone Control to generate, create UPCA image in iPhone applications. There are two main forms of oscillators. Linear bandpass filters are one form of oscillator. They may be analyzed for frequency (periodicity) and phase response. The MACD and MACDH are of this class. Another form of oscillator places some aspect of price behavior into a normalized scale (the RX, Stochastics, and CC1 belong to this class); unlike the first category, these oscillators are not linear filters with clearly defined phase and frequency behavior. Both types of oscillators highlight momentum and cyclical movement, while downplaying trends and eliminating longterm offsets: i.e., they both produce plots that tend to oscillate. The Moving Average Convergence Divergence Oscillator, or MACD (and MACDHistogram), operates as a crude bandpass filter, removing both slow trends and offsets, as well as highfrequency jitter or noise. It does this while passing through cyclic activity or waves that fall near the center of the passband. The MACD smooths data, as does a moving average; but it also removes some of the trend, highlighting cycles and sometimes moving in coincidence with the market, i.e., without lag. Ehlers (1989) is a good source of information on this oscillator. The MACD is computed by subtracting a longer moving average from a shorter moving average. It may be implemented using any kind of averages or lowpass filters (the classic MACD uses exponential moving averages). A number of variations on the MACD use more advanced moving averages, such as the VIDYA (discussed in the chapter on moving averages). Triangular moving averages have also been used to implement the MACD oscillaror. Along with the raw MACD, the socalled MACD Histogram (MACDH) is also used by many traders. This is computed by subtracting from the MACD a moving average of the MACD. In many cases, the moving average of the MACD is referred to as a signul line. The Stochastic oscillator is frequently referred to as an overbought/oversold indicator. According to Lupo (1994), The stochastic measures the location of the most recent market action in relation to the highest and lowest prices within the last n bars. In this sense, the Stochastic is a momentum indicator: It answers the question of whether the market is moving to new highs or new lows or is just meandering in the middle. The Stochastic is actually several related indicators: Fast %K, Slow %K (also known as Fast %D), and Slow %D. Fast %K measures, as a percentage, the location of the most recent closing price relative to the highest high and lowest low of the last II bars, where n is the length or period set for the indicator. Slow %K, which is identical to Fast %D, applies a 3bar (or 3day) moving average to both the numerator and denominator when computing the %K value. Slow %%J is simply a 3bar simple moving average of Slow %K; it is occasionally treated as a signal line in the same way that the moving average of the MACD is used as a signal line for the MACD. There have been many variations on the Stochastic reported over the years; e.g., Blau (1993) discussed a doublesmoothing variation. The equations for the Printing Barcode In None Using Barcode generation for Excel Control to generate, create bar code image in Office Excel applications. USS Code 39 Printer In Java Using Barcode printer for Java Control to generate, create Code 3/9 image in Java applications. classical Lane s Stochastic are described in an article by Meibahr (1992). A version of those equations appears below: A(i) = Highest of H(i), H(i  l), H(i  n + 1) B(i) = Lowest of .5(i), L(i  l), L(i  n + 1) D(i) = [A(i) + A(i  1) + A(i  2)] / 3 E(i) = [B(i) + B(i  1) + B(i 2)] / 3 F(i) = [C(i) + C(i  1) + C(i  2)] ! 3 Fast %K for ith bar = 100 * [C(i)  B(i)] / [A(i)  B(i)] Slow %K = Fast %D = 100 * [F(i)  E(i)] I [D(i)  E(i)] Slow %D = 3.bar simple moving average of Slow %K In these equations, i represents the bar index, H(i) the high of the ith bar, L(i) the low of the ith bar, and C(i) the close of the ith bar. All other letters refer to derived data series needed to compute the various Stochastic oscillators. As can be seen from the equations, the Stochastic oscillators highlight the relative position of the close in a range set by recent market highs and lows: High numbers (a maximum of 100) result when the close is near the top of the range of recent price activity and low numbers (a minimum of 0) when the close is near the bottom of the range. The Relative Strength Index, or RX is another wellknown oscillator that assesses relative movement up or down, and scales its output to a fixed range, 0 to 100. The classic RSI makes use of what is essentially an exponential moving average, separately computed for both up movement and down movement, with the result being up movement as a percentage of total movement. One variation is to use simple moving averages when computing the up and down movement components. The equations for the classic RSI appear below: C/(i) = Highest of 0, C(i)  C(i  1) D(i) = Highest of 0, C(i  1)  C(i) AU(i) = [(n  1) * AU(i  1) + U(i)] / n AD(i) = [(n  1) * AD(i  I) + D(i)] / n RSl(i) = 100 *AU(i) / [AU(i) + AD(i)] The indicator s period is represented by n, upward movement by U, downward movement by D, average upward movement by AU, and average downward movement by AD. The bars are indexed by i. Traditionally, a 1Cbar RSI (n = 14) would be calculated. A good discussion of the RSI can be found in Star (1993). Finally, there is the Commodities Channel Index, or Ccl, which is discussed in an article by Davies (1993). This oscillator is like a more statistically aware Stochastic: Instead of placing the closing price within bands defined by recent highs and lows, the CC1 evaluates the closing price in relation to bands delined by the mean and mean deviation of recent price activity. Although not discussed further in this chapter, the equations for this oscillator are presented below for interested readers: X(i) = H(i) + L(i) + C(i) A(i) = Simple nbar moving average of X(i) D(i) = Average of 1X(i  k)  A(i) 1 fork = 0 to n  1 XI(v) = [X(i)  A(i)] / [0.015 * D(i)] In the equations for the Commodities Channel Index, X represents the socalled median price, A the moving average of X, D the mean absolute deviations, II the period for the indicator, and i the bar index. Figure 7l shows a bar chart for the S&P 500. Appearing on the chart are the three most popular oscillators, along with items normally associated with them, e.g., signal lines or slower versions of the oscillator. Also drawn on the subgraph containing the Stochastic are the fixed thresholds of 80 and 20 often used as reference points. For the RSI, similar thresholds of 70 and 30, traditional numbers for that oscillator, are shown. This figure illustrates how these three oscillators appear, how they respond to prices, and what divergence (a concept discussed below) looks like. GENERATING ENTRIES WITH OSCILLATORS There are many ways to generate entry signals using oscillators. In this chapter, three are discussed. One popular means of generating entry signals is to treat the oscillator as an overbought/oversold indicator. A buy is signaled when the oscillator moves below some threshold, into oversold territory, and then crosses back above that threshold. A sell is signaled when the oscillator moves above another threshold, into overbought territory, and then crosses below that threshold. There are traditional thresholds that can used for the various oscillators. A second way oscillators are sometimes used to generate signals is with a socalled signal line, which is usually a moving average of the oscillator. Signals to take long or short positions are issued when the oscillator crosses above or below (respectively) the signal line. The trader can use these signals on their own in a reversal system or make use of additional, independent exit rules. Another common approach is to look for price/oscillator divergences, as described by McWhorter (1994). Divergence is when prices form a lower low while the oscillator forms a higher low (suggesting a buy), or when prices form a higher high while the oscillator forms a lower high (suggesting a loss of momentum and a possible sell). Divergence is sometimes easy to see subjectively, but almost always difficult to detect accurately using simple roles in a program. Generating signals mechanically for a divergence model requires algorithmic pattern recognition, making the correct implementation of such models rather complex and, therefore, difficult to test. Generating such signals can be done, however;

