#130 Bug in investment chart buy sell computation

[Staf Verhaegen]

I get a bug in displaying investment chart for UnitedKingdom. As you can see in the attached picture the Buy/Sell values are computed wrong for the mentioned Country. I don't see this problem for Belgium, Netherlands or UnitedStates.
System is Linux Centos6 64bit
Java is jre1.6.0_39 32bit
locale information:

LANG=nl_NL.utf8
LC_CTYPE="nl_NL.utf8"
LC_NUMERIC="nl_NL.utf8"
LC_TIME="nl_NL.utf8"
LC_COLLATE="nl_NL.utf8"
LC_MONETARY="nl_NL.utf8"
LC_MESSAGES="nl_NL.utf8"
LC_PAPER="nl_NL.utf8"
LC_NAME="nl_NL.utf8"
LC_ADDRESS="nl_NL.utf8"
LC_TELEPHONE="nl_NL.utf8"
LC_MEASUREMENT="nl_NL.utf8"
LC_IDENTIFICATION="nl_NL.utf8"
LC_ALL=

[Staf Verhaegen]

This is for the recent version 1.0.7f