In trying to follow the suggested detailed analysis, I am certain to fall short of describing in great detail the very simple use of a 50 day look back period and a 200 day look back period. As I understand this is typically done with moving averages to attempt to discover long term trends with "Death-Cross" being formed by the 50 period line moving downward through the 200 period line, and alternately a "Golden-Cross" being formed by the 50 period line moving upward through the 200 period line. The reasoning behind this is like with any moving average crossover using a fast period and slow period. 50 and 200 are typically used for long term underlying trends and price movement. In this particular case, I used linear regression analysis lines to see where the intersection of the turning point downward was confirmed since it appeared looking at price movement since 12-5-2014 was whipsawing and turning slightly downward.