Why do you not tell us how many shares you are short ---we all know you would like it to go to 15. The constant drill doesn't make it a self fulfilling prophesy. It could be 18 to 18.50 to 19 to 20. Get the picture?
My trading system has strict guidelines. So let me answer you this way.
My portfolio runs in the neighborhood of $150,000 thousand and I usually spread that out among 8-10 stocks which means that I usually do not have more than 10% of my portfolio into any one stock, unless I double up like I did today.
During the last 3 months the market has been difficult and I have brought down my exposure to the market where I normally enter a stock with about 6% of my portfolio.
6% of my portfolio is $9,000 per stock. Nonetheless, I do give stocks a probability rating and the higher probability I put more into it and the lower probability I put less into it. As such, my involvement would have been 500 shares but since I have a high probability rating with this stock I originally shorted 700. Now, with today's double-up I now have 1400 shares short.
Does that answer your question to your complete understanding of how my trading system works?