Two datapoints are not a trend.
People who use run charts (control charts,time series charts) talk about trends being a set of five points all going the same way. http://www.qihub.scot.nhs.uk/media/529936/run%20chart%20rule...
A single data point doesn't establish any direction or trend at all.
With two data points you can establish a trend and make a prediction about the next data point. However, any two data points form a line, so any two results can be used to make a trend, however wrong it may be.
Only when more points are used can you confirm the trend and reduce the probability of being (un)lucky.