Merge pull request freqtrade#12457 from luckynick/patch-2

Update exchanges.md - clarify Hyperliquid docs on subaccounts usage

Author: xmatthias

docs/exchanges.md

@@ -407,11 +407,12 @@ To use these with Freqtrade, you will need to use the following configuration pa
 ``` json
 "exchange": {
     "name": "hyperliquid",
-    "walletAddress": "your_vault_address",  // Vault or subaccount address
-    "privateKey": "your_api_private_key",
+    "walletAddress": "your_master_wallet_address", // Your master wallet address (not the API wallet address and not the vault/subaccount address).
+    "privateKey": "your_api_private_key", // API wallet private key (see https://app.hyperliquid.xyz/API). You'll only need the private key.
     "ccxt_config": {
         "options": {
-            "vaultAddress": "your_vault_address" // Optional, only if you want to use a vault or subaccount
+            "vaultAddress": "your_vault_address", // Optional, only if you want to use a vault ...
+            "subAccountAddress": "your_subaccount_address" // OR optional, only if you want to use a subaccount
         }
     },
     // ...
@@ -420,6 +421,9 @@ To use these with Freqtrade, you will need to use the following configuration pa
 
 Your balance and trades will now be used from your vault / subaccount - and no longer from your main account.
 
+!!! Note
+    You can only use either a vault or a subaccount - not both at the same time.
+
 ### Historic Hyperliquid data
 
 The Hyperliquid API does not provide historic data beyond the single call to fetch current data, so downloading data is not possible, as the downloaded data would not constitute proper historic data.