Program to control another program using winAPI

you Need a program robot to automate the execution of trading operations in the trading terminal Quik type.
Approximate type of terminal – attached figure 1.gif
For transactions and view the current situation in the terminal are used to price the glasses in the picture 2.gif.
When you change the price other market participants we need to quickly change the price after them. If you do it by means of the terminal, each such change takes up to 15 seconds because of the awkward interface.
You must write a robot that real-time reads from a glass of prices of other market participants and sets in the terminal our own prices at the level of leaders, but within the specified corridor of the prices and volumes of executed trades.
It is necessary to ensure the possibility of simultaneous works for 2-5 instruments.
Operating system windows 8.1
In suggestions please let me know the approximate cost of the work and necessary to create time.