how to make a certain item tradable or not?

[Nagahaku]

i know if i want to make a certain item being able to be traded, i should modify some column in items.txt.cooked, but i could not find it...
seems to be a very basic question... but i really donot know how..

[Malachor]

Column Bitmask05. Add noTrade if you don't want something able to be traded, though in singleplayer it won't matter, since there's no one to trade to. And remove it if you want to be able to trade it.

[Nagahaku]

uh... seems not like this...
i mean i want to make it be able to trade with npc merchants, i know it would be possible because there is already somebody made the cube purchasable from merchants.. i tried to add the cube into the merchant's entry within table treasure.txt, and it did appeared there, but impossible to buy, and also, i cannot sell the cube in my inventory.

[Malachor]

Have you given it  buyPriceAdd and sellPriceAdd values?

[Nagahaku]

solved, thx