Automated trade entry used for hedging at pre-defined price levels

Hi there - I would like a script that I can execute once I have entered a deal to protect me against market turns.  It will enter opposite deals at a specified price with varying lot amounts depending on the number of market turns (algorithm to be provided).  I live in Australia and find that my profitable open trades in my time zone can turn into big losses due to the volatility in EU and US markets!  This is my first time on this site so apologies if I have not followed correct protocol with the request!  I have attached a doc that illustrates what I would like to achieve.  Please let me know if you are interested in the request and I can provide more detail.