Find leases
If you want to find all leases from addr1 or (|) addr2 to addr3 (,) put the following into the corresponding fields:
Search request: (sender="addr1" | sender="addr2"), recipient="addr3", type=8
Fields to search for: sender, timestamp, height
Find trades
If you are looking for your trade history, you first have to find your public key (for some strange reasons, trading transactions are stored with the public key of the address instead of the address ifself). Then you can enter the following in the corresponding fields:
Search request: (order1_senderPublicKey = "publicKey" | order2_senderPublicKey = "publicKey")
Fields to search for: id, timestamp, order1_assetPair_amountAsset, order1_assetPair_priceAsset, order1_price, order1_amount, order1_orderType
General thing towards the syntax
Or concatenations are done with a | symbol, while and concatenations are done with a ,. Grouping can be done with simple (). The list of fields to search for are seperated with a ,.