chanlun

Generate a small line according to the pattern of the K-line, where green represents long and red represents short; （we call it pen）
then according to the small line segment, a large line(we call it line) is generated according to the new high or new low rule; (we call it line)
finally, a rectangle is generated according to the overlap interval of the large line.(we call it zhongshu)

Release Notes:

add new pen/line alert.