It's useful to consider also the volume variable when we do trading in Forex. It helps us to know how biggest is the exchange, if a trend is developing or not.
Moreover it bears in mind the prices and movements' tendency in relation to the exchanges: if a trend's volume is high, it means that the traders who have sold are less than those who have bought.
The other way round, if the volume is low or void, it means that the sold volumes, and so on the left quantity, are equal or bigger than the bought those.
In conclusion, the volume is a basic for having a right knowledge of the trend, and for understanding if that movement is on the crease or downward trend, if it's due to a true purchase or to a simple closing of position before opened.

We won't have a volumetric analysis of cross, because this market is OTC (Over The Counter), not controlled and not defined, so it's impossible to be able to calculate the measures of the exchanges.
The Forex doesn't refer to a defined and absolute value, but it's only based on the values assumed in that actual moment as regards the pass value, in this case this is called increasing volumes.
For overcoming this problem, we should use also the volumes of the contacts' Futures in value, because they give to us a better description of the sentiment and movements of this market.
However, the official global organization, as the International Rules Bank, picks up periodically the dates from the principle Central Banks all over the world, and it makes s free publication.

According to the assertion "the volumes must confirm the trend", if a trend is on the crease, the sold volume has to be always increasing than the bought volume.
In reality that doesn't happen, because the danger of false warnings is real and the caution is necessary.
In fact, we suggest the analysis of the graphics or of the tool, as the constant volume column or the volume-price bar-chart for avoiding risky movement.
For example the candlestick graphic is useful for understanding the development of market, we have only to see the body of the candle.
If the body becomes higher little by little, more volumes will be exchanged.
The other way, if the body is short or nonexistent, the sold quantities are the same of bought those.
In the last fifty years, the volumes are developing in a runaway and enormous way, and today they are the biggest and liquid market all over the world.

The prices, like the volumes, don't have a fix and official quotation, but they are everyday updated by Reuters and Bloomberg, the principle information centre, or established as operating prices by the Market Makers in the circuits of the middleman.
The traders are directly informed through the platform of the operative information.

Linking up with volumes, the prices' value is calculated by the volume's quantity: bigger is the volume, most important will be the price.
The leading indicator is the best price's marker. It's use to know the movement of volume and of its whole different pointers, and so to foresee the price's trend.