<s>
TradElect	B-Application
was	O
the	O
London	O
Stock	O
Exchange	O
's	O
main	O
electronic	O
trading	O
platform	O
from	O
2007	O
to	O
2011	O
.	O
</s>
<s>
It	O
ran	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
using	O
.NET	B-Application
technology	O
and	O
Microsoft	B-Application
SQL	I-Application
Server	I-Application
.	O
</s>
<s>
The	O
impetus	O
for	O
the	O
development	O
of	O
TradElect	B-Application
was	O
the	O
rise	O
of	O
algorithmic	O
trading	O
and	O
the	O
liberalisation	O
of	O
the	O
trading	O
sector	O
in	O
Europe	O
due	O
to	O
the	O
Markets	O
in	O
Financial	O
Instruments	O
Directive	O
.	O
</s>
<s>
The	O
system	O
which	O
TradElect	B-Application
replaced	O
,	O
Sets	O
,	O
was	O
10	O
years	O
old	O
and	O
took	O
140ms	O
to	O
complete	O
a	O
trade	O
,	O
compared	O
to	O
TradElect	B-Application
's	O
10ms	O
.	O
</s>
<s>
In	O
April	O
2010	O
the	O
Oslo	O
Stock	O
Exchange	O
also	O
adopted	O
TradElect	B-Application
,	O
as	O
part	O
of	O
a	O
strategic	O
partnership	O
agreement	O
.	O
</s>
<s>
The	O
Johannesburg	O
Stock	O
Exchange	O
also	O
adopted	O
TradElect	B-Application
.	O
</s>
<s>
On	O
8	O
September	O
2008	O
,	O
TradElect	B-Application
trading	O
was	O
mostly	O
unavailable	O
for	O
over	O
7	O
hours	O
,	O
on	O
what	O
the	O
Wall	O
Street	O
Journal	O
described	O
as	O
a	O
"	O
huge	O
trading	O
day	O
"	O
.	O
</s>
<s>
The	O
London	O
Stock	O
Exchange	O
claimed	O
that	O
the	O
TradElect	B-Application
software	O
was	O
not	O
to	O
blame	O
,	O
instead	O
blaming	O
an	O
unspecified	O
fault	O
with	O
"	O
network	O
software	O
"	O
.	O
</s>
<s>
Microsoft	O
had	O
previously	O
used	O
TradElect	B-Application
as	O
a	O
case	O
study	O
in	O
marketing	O
material	O
to	O
position	O
its	O
Windows	B-Application
operating	I-Application
system	I-Application
as	O
suitable	O
for	O
"	O
highly	O
reliable	O
"	O
systems	O
.	O
</s>
<s>
Only	O
two	O
years	O
after	O
TradElect	B-Application
had	O
first	O
gone	O
live	O
,	O
the	O
London	O
Stock	O
Exchange	O
decided	O
to	O
scrap	O
it	O
and	O
replace	O
it	O
with	O
something	O
else	O
.	O
</s>
<s>
The	O
LSE	O
investigated	O
the	O
possibility	O
of	O
building	O
a	O
new	O
system	O
in-house	O
,	O
but	O
eventually	O
decided	O
on	O
acquiring	O
the	O
existing	O
,	O
Linux-based	O
system	O
Millennium	O
Exchange	O
,	O
which	O
had	O
a	O
lower	O
,	O
sub-millisecond	O
latency	O
.	O
</s>
<s>
By	O
2011	O
,	O
TradElect	B-Application
had	O
been	O
completely	O
replaced	O
with	O
Millennium	O
Exchange	O
at	O
the	O
London	O
Stock	O
Exchange	O
.	O
</s>
