v. 3 was fine but not version 4.
settings for v.4 test are:
capital = 1000 x 100%
leverage = 20
price = 38754
contracts used in first trade => 0.62076
(should be 0.51607)
settings for v.3 test are:
capital = 1000 x 100%
leverage = 20
price = 37627
contracts used in first trade => 0.5303
(should be 0.5315 – close enough)