gnuplot a csv...

gistfile1.txt

mattb@mattb-mbp:~ $ head infile.csv 
elapsed,spent,price
0.127883,0.115402,6.552
0.128115,0.115402,7.207
0.128346,0.116246,7.927
0.128578,0.116246,8.719
0.128809,0.118902,8.806
0.129041,0.119576,8.894
0.129272,0.120159,8.982
0.129504,0.120817,9.071
0.129735,0.122691,9.161

mattb@mattb-mbp:~ $ cat pacing.gp 
set datafile separator ','
set key autotitle columnhead
set ytics nomirror
set y2tics
plot 'infile.csv' using :1 with lines, '' using :2 with lines, '' using :3 with lines axes x1y2