class Iro::Purse

def self.list
  [[nil,nil]] + all.map { |p| [p, p.id] }
end

def available
  available_amount
end

def balance
  0.01
end

def delta_to_plot_p( *args )
  x = delta_wt_avg( *args ).abs
  if x < 0.5
    y = 1
  else
    y = 2 - 1/( 1.5 - x )
  end
  y_ = "#{ (y*100) .to_i}%"
  return y_
end

def delta_wt_avg( begin_end, long_short, inner_outer )
  max_loss_total = 0
  out = positions.send( long_short ).map do |pos|
    max_loss_total += pos.max_loss * pos.q
    pos.max_loss * pos.q * pos.send( inner_outer ).send( "#{begin_end}_delta" )
  end
  # puts! out, 'delta_wt_avg 1'
  out = out.reduce( &:+ ) / max_loss_total rescue 0
  # puts! out, 'delta_wt_avg 2'
  return out
end

def to_s
  slug
end