gistfile1.rb

require 'date'

# Shows the highest potential markup for items. Doesn't really filter out spam inputs.

# top listed items
# >> puts orders.keys.sort_by{|n|orders[n].map{|e|e[:vol_enter]||1}.inject(&:+)}.reverse[0..10]


# >> orders[f].select{|e|e[:bid]==:buy}.map{|e|e[:price]}
# => [201000, 200002, 200002, 200001, 199999, 65000, 51003, 51003, 51003, 51000, 30000, 5555]
# >> orders[f].select{|e|e[:bid]==:sell}.map{|e|e[:price]}
# => [927699, 927699, 929999, 958999, 999695]

orders = Marshal.load(File.read('item_orders.marshal'))

markups = {}

orders.each do |name,olist|
  selling = olist.select{|e|e[:bid] == :sell}
  buying  = olist.select{|e|e[:bid] == :buy}

  next if selling.size < 4 || buying.size < 2
  
  top_buy       =  buying.map{|e|e[:price]}.sort.last
  expected_sell = selling.map{|e|e[:price]}.sort.first

  markups[name] = expected_sell.to_f / top_buy.to_f
end

markups.keys.sort_by{|e|markups[e]}.reverse[0..20].each do |e|
  puts "#{e} : #{markups[e]}"
end