The Fibonacci trendlines may be used to help determine price support/resistance at or near certain levels. The Fibonacci lines occur at 0.0%, 23.6%, 38.2%, 50.0%, 61.8%, 76.4% and 100.0%. Retracements occurring at these points within a trend could be used to help determine entry and exit points for a contract. For more information, see the TWS Users’ Guide.