Abdi,
The 15m stochs signal is from the K/D cross in the 15m chart.
In the chart grabs below the first illustration is when the arrow/line appears - it is not 15m until the signal appears. It gives time to assess the validity of the signal and in this specific trade it was a good signal.
The second chart is the finish of the uptrend and gives time to assess if this is indeed the top of this upmove - there is divergence but this is a strong upmove and it could well 'disappear' as the upmove continues. Price never moves up forever.
I have also added a background zone indicator to show when stochs 233 is over 95 (pink) or under 5 (palegreen). It just gives a better chance of winning trades.
TEAMTRADER