For all economic calendar indicators, you will find the Previous number: that is the data in its last release (frequency of data release is variable: it can be last month, last trimester…). For most indicators, we add a Consensus number: that is a general agreement of experts on the outcome of the number. When the Actual data is released, it’s immediately displayed at the right of the volatility indicator. Better or worse than expected? If we had a consensus published, it comes either in green (it means the data is better than expected) or in red (worse than expected). The Deviation ratio is an FXStreet exclusive calculation which measures the surprise caused by an event when the Actual data differs from the Consensus. Its number usually oscillates in an open scale between -7 and +7. 

Entry points are usually designated by an oscillator (RSI, CCI etc) and exit points are calculated based on a positive risk-reward ratio. Using stop level distances, traders can either equal that distance or exceed it to maintain a positive risk-reward ratio e.g. If the stop level was placed 50 pips away, the take profit level wold be set at 50 pips or more away from the entry point.
If traders are positive on the prospects for the Yen, they would expect the number on the right to go down – i.e. the Yen would be getting stronger against the Dollar. Traders would be buying less Yen with a Dollar as the Yen got stronger. Similarly, if the Yen was expected to weaken, forex traders would expect the Yen number to go up, reflecting the fact that the dollar could buy more yen.