Volatility adjusted position sizes

We know that  volatility is derived from the past changes of the securitys price and we know it is calculated by multiplying the square root of time in years with the standard deviation of the securitys price within that timeframe.
What I am interested about, is using it to determine position sizes and its effects on reducing losses. Volatilty can work on one´s favor or  it can also lead to major losses. The volatility index is known as the "fear index" which indicates the bad times for stock options. 

 Volatility adjusted positions are crucial for reducing risk. A position could be determined by subtracting the current volatility percentage from 1 and multiplying the factor with the usual contract size. Obviously your broker must offer splittable contracts or then you have to trade large amounts to enter such positions. Also cfd (contracts for difference) brokers offer microlots to trade with.

                                                           VAP. = (1- Vola%) * contract size
                                                                                or
                                                           VAP.= (1-√T*σ) * contract size




What about gold?

XAUUSD with Simple Moving Averages 200 and 50

As we know gold as the safe haven for investors, we may have some potential to buy in the near future .
Last week major stock indexes declined and as soon as they start to trend down we know there is a lot "air" for gold. On the other hand, blue chip companies have had a great year and therefore ivestors are holding on the stocks to receive generous dividends. Moreover there is  a rumor about gold that the Indian government would loosen their tight regulation regarding importing gold.

From the technical perspective, we had almost a breakout of the downtrend last week at 1.268, but it turned out to be a testing of the resistance or false breakout. As soon as we have some 1,2,3 formations and a breakout over the 2, I would buy. A turbo-long certificate would be the suitable. A drop below 1.180 would mean, that it is still a bearish climate.