Response time for second monitor

Hello,

I recently purchased an Acer 23" monitor (Model S231HL with HDMI and ms response time) that I want to use as a second monitor when I am trading stocks online. The Acer monitor is connected to my HP dv6 laptop with the HDMI cable provided by Acer. I use the Acer monitor to display Fidelity Investments' Active Trader trading software. The response time is extremely slow. I cannot even get stock quotes. Perhaps Friday's trading volume was exceptionally high due to headline news causing the slowness but when I disconnected the second monitor and just used the monitor on my laptop I started to get real time response. It would be great if you could trouble shoot with me to see if some of the settings can be changed in order to get real time response. Do I need to exchgange my monitor for one that has 2ms or can I change settings to im[prove response time? Thank you. Jim