EVE Master securely reads EVE Online memory in real-time, it is safe, fast and can't be detected by the game or third parties. The data is available in simple graphical visualization form, and could be used by simple visual connections. For example you can take your ship current Shield value and use it for warping to a safe spot if the value is less you want. Just need to press Play button and EVE Master begins to execute it.
The concept is quit simple, just add needed node, connect it, that is all. If you there is no needed node, just create it. All what you see above is a dedicated node. You may use it as nested node inside another node.
You can use already created nodes by someone or create your own custom node for any solution you need. Nodes are very flexible to doing anything (exclude Planetary Production).