defining extremes

Please see the screenshot above.

Say you are aiming to trade the news, and you look at previous forecasts VS actuals and then how the market moved. What I've found is it's not an exact science between how far off the actual number is from the forecasts which dictates how far the market moves at the time of the news release.

I'm interested in what people use to define their 'extremes' which they will use to enter the market if the number is much larger or smaller than anticipated.

I've looked at the SMQ but that appears to be a longer term historic indicator than what i'm looking for. I plan to be in and out of a trade within a minute or two. The difficulty I have is creating my own "boundaries" of which when exceeded I'd be happy to enter the market. For example the forecast is 100
I'd look for a long entry if the actual is 110 or above
I'd look for a short entry in the actual is 90 or below

I can see the forecast number prior to the news release, I just don't know how to setup my boundaries as explained above.

Any advice would be appreciated.

Thanks
Ryan