Is it possible to have Si as a dominant function and also to not notice (let alone chart) detail?Si is incredibly detailed and Ne wants the big picture. My INTP bf operates in Ti-Si mode most of the time and I get impatient with all the details. There is a huge difference in the way we speak. I fluctuate between Ne-Fe mode and Ne-Ti mode, but Si rarely fits in anywhere. I have absolutely no patience for all the details - I can't stress that enough. It drives me quite insane, in fact. I simply don't care.
You talked of Si giving you the ability of being a possible stock market maverick... Ne can look at trends overall and possibly predict which way the wind will blow, but it will not systematically analyze and store data and compare it to present data to predict the outcome. The details do not matter. I suspect that my ex was Si dominant, as he and his father actually had this huge graph that they added data to every day for years (years!!) to play the market with. I couldn't fathom such a thing.
My Ne is at it's best when exploring possibilities, not simply making connections. You can come to me with a problem I can instantly ramble off a million and one things that could happen if you follow this path and a million other things that can happen if you follow another. This is why I was very good in my first career in software QA. I literally take the thing we are speaking about and hold it up in a 3D way in my mind and rapidly poke at it from every angle imaginable. It usually stuns people and I often hear "wow, I never thought of that" a lot. I just have the ability to see the big picture, from all angles, very quickly. I can spot a weak spot a mile away. Remembering the past events with detail and imagining a theoretical model before it's built are 2 entirely different things.
Coupled with Ti, this allows me assess exactly what someone means from the words they choose and I can instantly throw you back something you know to be absolutely true and make you doubt yourself - I know this seems mundane, but it's really not. It is no coincidence that the legal profession is filled with teflon-sprayed ENTPs. I can really excel and twist the concept in someone's words around and leaving them (and their belief system) in a pile of shambles. This is not something I am explaining with pride, I am explaining it so you can get a better idea of how Si is very different from Ne.
Ne statements (according to wikisocion) tend to sound more like "just out of curiosity...", "so, what you're really saying is...", "what would happen if...", "in the long run, it makes more sense to..." and words that are conditional in nature.
Si statements (from the same source): "once I get settled...", "I feel comfortable doing...", "compared to last time...", and words that involve a lot of texture.