Dear Lords Onlineplayer, IronApex and Fabien
To add a few comments to those of Juglar :
Firstly in any rolling 7 day period, the total flow of resources between two castles may not exceed 50k in either direction.
This includes resources transferred in the form of raids and by caravans.
Example:
If a castle has enough resources outside of its catacombs
AND EITHER I send 50K resources to that castle in two caravan loads OR they raid 50K from me
then I can raid up to 100k resources from that castle provided that
• someone else didnt raid the castle between my spying and raiding and the player didnt use or hide the resources.
• I sent enough troops to carry the resources back
Note:
1) The important thing is that the balance of resource transfer at the time when the raid hits is important. So if you send a caravan immediately before your raid hits (about 30 seconds) and then cancel immediately after your raid hits the castle, then you can raid 50K plus the amount of resources in the caravan you sent to them. This means that you can send one caravan in advance and one at the time of the raid, which never actually reaches the castle. This is also important as you are limited to six caravan transfers per day.
2) It is easier to get the timing of the caravan transfer right if you go into the settings page and switch off animations, especially if you have raids hitting different castles less than a minute apart and want to send and cancel a caravan transfer to each of them.
3) The same method can be used to reduce the amount another player is able to raid from you if you are not going to defend: Send a caravan to their castle 30 seconds before their raid hits your castle and then cancel immediately after the raid.
This means that they will be able to raid 50k minus the amount in your caravan.