
P1:a/b P2:c/d QC:e/f T1:g
c06 JWBK195-Saettele June 5, 2008 19:35 Printer: Yet to come
140 SENTIMENT IN THE FOREX MARKET
FIGURE 6.31 The bold bars indicate when price closes above the 1 standard de-
viation upper Bollinger band or below the 1 standard deviation lower Bollinger band
Source: Chart created on TradeStation
R
, the flagship product of TradeStation Tech-
nologies, Inc.
The bias is determined as presented in this chapter. The tests were
for RSI(70, 30), RSI(60, 40), stochastic oscillator(80, 20), stochastic oscil-
lator(70, 30), Bollinger band(2 stdev), and Bollinger band(1 stdev). I ran
three more tests: one each for RSI, the stochastic oscillator, and Bollinger
bands, to illustrate that using them to trade reversals does not work so
well. For RSI and the stochastic oscillator, the rules are to sell at the low of
the bar once the indicator crosses below the overbought level (70 for RSI
and 80 for the stochastic oscillator). Similarly, a buy order is placed at the
high of the bar once the indicator crosses above the oversold level (30 and
20). I used 13 as the length for both oscillators. The Bollinger band reversal
strategy sells at the low of the bar once the price crosses and closes below
the upper band. A buy order is placed at the high of the bar when the price
crosses and closes above the lower band. I used a 21-week lookback pe-
riod and bands of 1 and 2 standard deviations. There ...