Current logic for the suggestions section:

New items to list:

• Only looks at items in your hangar in trade-route destinations, no containers, but does include ship hulls.
• First, calculate a price that is a 5% profit from the last time you bought that item.
• Then, check to see if there are any other orders in that station at that price or lower, if not, suggest to list this item.

Example:

• You last bought crack for 10k isk
• To get a 5% profit, you need to sell it for 12k isk (profit includes shipping, tax, broker fee so it's more than 1.05 * price)
• Check station to see if there are orders lower than 12k
  • If not, suggest it

Orders to relist

• Take an existing sell order you have
• Find all the other orders listed lower than it
• Sum up the quantity of all those orders
• Figure out the daily volume of the item
• If there is more than 3/4 a day of volume below your order, and if the lowest price would still make you a 10% profit, suggest to relist

Example:

• You're selling crack at 15k
• There are 2 orders below yours, 20@14k and 30@13k
• Daily volume is 50
• If we can make a 10% profit, we do suggest to relist the item

Example 2:

• You're selling crack at 15k
• There are 2 orders below yours, 20@14k and 30@13k
• Daily volume is 100
• Don't suggest to relist, it's likely at the current volume that those lower orders will sell out and get into your order.

Suggest to cancel

Sometimes, you need to free up order slots. This suggestion will point at orders that aren't doing too good right now.

• Take an existing order you have
• Figure out how many orders are selling below it
• Take a look at daily volume
• If there are at least 5 days of volume, and the bottom one would net less than 5% profit, suggest it