How Overextended is Gold?

I have been going over the market for gold ($GOLD) in class since last week. We have looked at daily and weekly data, viewed the RSI, and we have gone back to consider where the US Dollar ($USD) is, as the dollar and commodities are inversely related (other things being equal). What I want to do in this post is to show you another way to show whether something is overbought or oversold.

First, chart  $GOLD using daily data. Find a moving average that fits the time period under consideration very well. After a number of different values (starting from 20-day to higher periods), I found that the 150-day simple moving average fits gold very well, as the chart shows (click to enlarge).

To find a way to view how far the closing price is from this moving average, under "Indicators" below the graph, use the following information with StockCharts.com: MACD with values 1,150,1 (select MACD then enter the values I indicated).

That produces the graph below the Gold chart. You can annotate any (or all) of this set of charts. Here, apply a horizontal line to the peaks of the gap measure (the MACD values) to find where resistance has been before. It should be clear from the chart that recently, Gold price moved above its 150-day moving average by the greatest amount since either June of 2008 or September of this year. Note, also, this has occurred as Gold is very overbought based on the RSI (which is also showing a bearish divergence).So, you can see from this chart that there is yet another basis to conclude that some short-term pullback in Gold price is likely. Note, though, that markets can remain overbought for some time, so any pullback might not occur for a while yet.