This reminds me Speed Resistance Lines tool from Metastock. If interested, try to do the following. Enter "0.33" as your first level in Fibo fan properties and "1/3" for description and "0.67" as your second level and "2/3" for description. Apply the fan from a swing low to the swing high. Enter short when the price crosses "1/3" line. Exit when it crosses "2/3". Do opposite when applied from a high to the low.