So here is an example of GANN 'Straight Shape' which played out on XTZBTC
Top -> Bounced at 180 (Long) -> Hit 90 (Short) -> Finished at 270.
On Fib Ext, Top to 180 reflected at 90 1:1 extension to 27
Top -> Bounced at 180 (Long) -> Hit 90 (Short) -> Finished at 270.
On Fib Ext, Top to 180 reflected at 90 1:1 extension to 27