gnuplot display y2 values on x2 - linux

Question

I have the following graph:
first data set display searches.
second data set display clicks.
y1 shows searches scale, y2 shows click scale.
on the x1 I have time values displayed.
I wish to display clicks values (each hour) on x2 (the upper axis).
When I add the command set x2tics it displays the searches data and not the clicks like I wished.
How do I change it so it will display the clicks unit?
Gnuplot script:
set xlabel "Time"
set ylabel "Times"
set y2range [0:55000]
set y2tics 0, 1000
set ytics nomirror
set datafile separator "|"
set title "History of searches"
set xdata time # The x axis data is time
set timefmt "%Y-%m-%d %H:%M" # The dates in the file look like 10-Jun-04
set format x "%d/%m\n%H:%M"
set grid
set terminal png size 1024,768 # gnuplot recommends setting terminal before output
set output "outputFILE.png" # The output filename; to be set after setting
# terminal
load "labelsFILE"
plot 'goodFILE' using 1:3 lt 2 with lines t 'Success' , 'clicksFILE' using 1:2 lt 5 with lines t 'Clicks right Y' axis x1y2
replot
Graph:
graph http://img42.imageshack.us/img42/1269/wu0b.png

Answer 1

Ok, so to get started, here is how you can set a label with the number of clicks as follows (using you data file names):
plot 'goodFILE' using 1:3 lt 2 with lines t 'Success',\
'clicksFILE' using 1:2 lt 5 with lines t 'Clicks right Y' axis x1y2,\
'' using 1:2:(sprintf("%dk", int($2/1000.0))) with labels axis x1y2 offset 0,1 t ''
Just add this as plotting command, and it should work just fine.
To illustrate, how the labels might look like, here is an example with some dummy data:
set terminal pngcairo
set output 'blubb.png'
set xlabel "Time"
set ylabel "Times"
set y2label "Clicks per hour"
set y2range [0:10000]
set yrange [0:1]
set ytics nomirror
set y2tics
set key left
set samples 11
set xrange[0:10000]
plot '+' using 1:1:(sprintf("%dk", int($1/1000.0))) every ::1::9 with labels axis x1y2 offset 0,1 t '',\
'' using 1:1 with linespoints axis x1y2 pt 7 t 'Clicks per hour'
Which gives you: