I follow the footprints and find a crab!

crab harmonic pattern:
X=$913
AB=0.61 XA
BC=0.38 AB
0.78 XA=$204
1.6 BC=$207
0.88 XA=$411
2 BC=$433
2.24 BC=$687
2.6 BC=$1421
1.13 XA=$2263
1.27 XA=$6102
3.6 BC=$9722
1.41 XA=$15995
4.24 BC=$31904
1.6 XA=$68370