I prefer relying on TA + fundamentals than worrying about these walls. Most of the time they get canceled before processed and are set just to scare traders or to keep price up/down. The chart you see is just for one exchange. So even if the price is determined by many exchanges together, the buy wall would only cause effects on this one. We also have a lot of bots trading so usually the prices of different exchanges walk together. I usually track Bitifinex + USDT Bittrex together (in the same chart) and sometimes this helps me forecast the incoming moves (not always )
Let’s imagine this wall of 104btc @ 4005usd is eaten up by a strong Selling Force, then we would have a big sell volume spike, while the price would move down to the next buy order at 4000usd. Only 5 dollars difference with a huge volume traded. Naturally the big volume would suggest a downtrend.
Another possible scenario, is when a lot of Buy Orders are set on top of the wall, causing the price to rise… and after a while the wall disappears and (maybe?) the Whale got what he wanted.
Another possible scenario: the market price ‘wants’ to go down (TA + news suggests downtrend), but the buy wall would ‘delay’ this downtrend a bit. Maybe the price go up a bit as consequence of the wall, but goes down afterwards (maybe after wall disappear, who knows?)
Anyway, its all speculation and the crypto-crazy-market can be very surprising quite often. It’s like a rollercoaster (and I it). That’s why I find it useful to play with possible scenarios (TA) + fundamentals (specially for long term) + risk management.
Sry for bad english