i know blockchain.info did that with the wallet i had there but i don't want to have a wallet there with private keys i just want to import the addresses (my cold storage) and receive a message preferably through SMS not email telling me of any change.
Im sure none at about 90%.
It requires a collaboration of the "watch only" app with the exchange wallets so in other words you must have a wallet in that exchange and use their service to triggered the alerts. There is no way the "watch only app" will have an access to the internal stuff of the exchange wallet without a linked to the wallet itself.