Short Term Trading Weekend Lounge: 7 -9 Apr, page-156

Coil, a chart pattern reference:

http://www.kpo.co.za/duplo/setup03.htm

Definition The coiled spring gets its name from the narrowing range the stock trades in over the last seven to twenty trading days as shares consolidate at or near its new high. This range can trade sideways or it can downtrend slightly, but it should not be trading at an upward angle. The key to the pattern is that the trading range, in general, is getting tighter and tighter.​