When you use the pdf-fire-trend indicator,
attach it to the chart as it is.
Then click again on it in the navigator and drag it on the pdf-fire-trend indicator window which is already on the chart.
It will open the properties menu.
There you insert the "key2" numbers into
the "key" field ( delete the key which is in the field ).
Then click "ok" and you will see the correct indicator drawn on the chart.