Sure SSchulman,

What you are looking for are at least two, and ideally three or more, swing points that all line up. In this case, for the "neckline" of the pattern what you are looking for are several highs that line up. I have identified those points in the first chart below in green, as well as the points that correspond to the lows of the "base" in red.

Once that is done...then you can draw in your trendlines. In most cases you won't need one for the bottom of the base as that point will be a clear low. However, in this case where you have a relatively flat bottom with several lows in a similar area it can be helpful to do so...as you will be measuring the greatest distance from anyone of the lows...back up to the neckline, (in blue chart #2), and using the greatest distance to establish the "projection" to the area of the next high.

Finally, as you can see from chart #3...you then measure the greatest depth from the lows to the "neckline" and that distance then becomes your "projection". Your "projection" is then "projected" forward in the prevailing direction of the pattern...starting at the point of the pattern where the neckline is finally broken.

As you can see in this instance the exact measurements target an area just below the filling of last Thursdays gap, which happens to coincide with the last swing low, or "pivot", that was made just prior to the breakdown.

Let me know if this helps..

C