Single-tier trailing forces one decision to serve a position's whole life. Tiering lets that decision change as the position develops — which is genuinely useful, and is also exactly what makes it easy to fit noise instead of structure.
Most traders obsess over entries and treat exits as an afterthought — which is backwards, because exits determine most of the outcome. This is a mechanical, layer-by-layer walkthrough of a full automated exit stack: the initial fixed stop, the trailing trigger that switches the trade from loss-protection to profit-protection, single- and multi-tier trailing, break-even, and the OCO brackets that hold it all together. It also states plainly what no trading pitch will: a stop does not guarantee your fill, and gaps and slippage are real.