<s>
Day	B-Application
trading	I-Application
software	I-Application
is	O
computer	O
software	O
intended	O
to	O
facilitate	O
day	O
trading	O
of	O
stocks	O
or	O
other	O
financial	O
instruments	O
.	O
</s>
<s>
Day	B-Application
trading	I-Application
software	I-Application
falls	O
into	O
three	O
main	O
categories	O
:	O
data	O
,	O
charting	O
,	O
and	O
trade	O
execution	O
.	O
</s>
<s>
Some	O
market	O
data	O
software	O
products	O
provide	O
data	O
for	O
visualization	O
,	O
while	O
others	O
provide	O
programmatic	O
access	O
via	O
APIs	B-Application
.	O
</s>
<s>
Many	O
trade	O
execution	O
software	O
allow	O
advanced	O
traders	O
to	O
develop	O
their	O
own	O
trading	O
strategies	O
by	O
using	O
an	O
application	B-Application
programming	I-Application
interface	I-Application
.	O
</s>
<s>
Most	O
stock	O
brokerage	O
firms	O
will	O
provide	O
proprietary	O
software	O
linked	O
directly	O
to	O
their	O
in-house	O
systems	O
,	O
but	O
many	O
third	O
party	O
applications	O
are	O
available	O
through	O
Independent	B-Application
software	I-Application
vendors	I-Application
.	O
</s>
