Pardon my drawing skills, but I have tried to illustrate using your own chart. I have tried to illustrate the other possibility.
1) Now, you have noticed the divergence using 2 crossover points (bullets) on stochs coinciding with 2 pivots on the price. It is not a given fact that after 2 such points the bearishness will set in. If the momentum is strong enough, the price may carry on upwards, but if the stochs make another crossover point below the 2nd one, then it makes for the third bullet on divergence.
2) Between bullet no. 1 and 2, the stochs did not go below 30/20, they reverted from the neutral zone. This is a strong signal of trend continuation.
Timepass,
Your analysis is good, but here there are one or two points I want to make.
1. Nifty has been in uptrend since 19th Dec, consistently making higher lows
and higher highs. So any divergence indicating a downside would be a short-
lived one compared to the odds in favour of upside.
2. If we wait for the confirmation in terms of a third bullet, chances are that
we may be missing a very good move. There are several instances where
the divergences occurred on two peaks/lows worked well. Of course, they
work well in the direction of the trend only, often.
3. The stoch should not enter the other zone between two peaks/lows,
otherwise it is not considered to be a divergence as per ST. The same point
has been brought out by Rangarajan also.
If shorting is to be done based on divergence between the two peaks:
4. If you take the trendline breakout method of SG to find out the probable
time of taking the trade, you will observe that we have to take the trade
when the stoch is in OB zone, because it will be in the OB zone only when the
trendline is broken. Is it advisable to take a short trade while the stoch
is still in OB zone? (Frankly, I don't know the answer!)