Bollinger Bands
Bollinger Bands are volatility curves used to identify extreme highs or lows in relation to price. Bollinger Bands establish trading parameters, or bands, based on the moving average of a particular instrument and a set number of standard deviations around this moving average.
For example, a trader might decide to use a 10-day moving average and 2 standard deviations to establish Bollinger Bands for a given currency. After doing so, a chart will appear with price bars capped by an upper boundary line based on price levels 2 standard deviations higher than the 10-day moving average and supported by a lower boundary line based on 2 standard deviations lower than the 10-day moving average. In the middle of these two boundary lines will be another line running somewhat close to the middle area depicting in this case, the 10-day moving average. Both the moving average and the number of standard deviations can be altered to best suit a particular currency.
Jon Bollinger, creator of Bollinger Bands recommends using a simple 20-day moving average and 2 standard deviations. Because standard deviation is a measure of volatility, Bollinger Bands are dynamic indicators that adjust themselves (widen and contract) based on the current levels of volatility in the market being studied. When prices hit the upper or lower boundaries of a given set of Bollinger Bands, this is not necessarily an indication of an imminent reversal in a trend. It simply means that prices have moved to the upper limits of the established parameters. Therefore, traders should use another study in conjunction with Bollinger Bands to help them determine the strength of a trend.
MACD – Moving Average Convergence Divergence
MACD is a more detailed method of using moving averages to find trading signals from price charts. Developed by Gerald Appel, the MACD plots the difference between a 26-day exponential moving average and a 12-day exponential moving average. A 9-day moving average is generally used as a trigger line, meaning when the MACD crosses below this trigger it is a bearish signal and when it crosses above it, it’s a bullish signal.
As with other studies, traders will look to MACD studies to provide early signals or divergences between market prices and a technical indicator. If the MACD turns positive and makes higher lows while prices are still tanking, this could be a strong buy signal. Conversely, if the MACD makes lower highs while prices are making new highs, this could be a strong bearish divergence and a sell signal.
Fibonacci Retracements
Fibonacci retracement levels are a sequence of numbers discovered by the noted mathematician Leonardo da Pisa during the twelfth century. These numbers describe cycles found throughout nature and when applied to technical analysis can be used to find pullbacks in the currency market.
Fibonacci retracement involves anticipating changes in trends as prices near the lines created by the Fibonacci studies. After a significant price move (either up or down), prices will often retrace a significant portion (if not all) of the original move. As prices retrace, support and resistance levels often occur at or near the Fibonacci Retracement levels.
In the currency markets, the commonly used sequence of ratios is 23.6 %, 38.2%, 50% and 61.8%. Fibonacci retracement levels can easily be displayed by connecting a trend line from a perceived high point to a perceived low point. By taking the difference between the high and low, the user can apply the % ratios to achieve the desired pullbacks.
One final word of advice: Don’t get too caught up in the mathematics involved in putting together each study. It is much more important to understand how and why studies can and should be manipulated based on the time periods and sensitivities that you determine are ideal for the currency you are trading. These ideal levels can only be determined after applying several different parameters to each study until the charts and studies begin to reveal the “details behind the details.”
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