Using my opinion and observations I will reply with the following answers:
1a. If L2 is bullish, T&S is bullish, Candle Sticks (i.e. 5min and/or 1 min) are bullish and volume on 5min/1 min is increasing over previous and you are at support (i.e. Thor's WHERE) look to pull trigger for longs. U also should have plan for your target and partials. Stops behind the level or being aggressive a few cents behind the price level u observed the large order/transaction.
1b. Interpreting a bullish T&S: Aggressive bullish transactions are green (the default colors) orders, BUT has the price MOVED UP from the previous price level on the LARGE T&S tape display ? If YES then bulls at that point in time (and for the next 5 seconds) are winning and it may continue. This could be the start of the move or just a glitch in the MATRIX.....LOL. U have to have the probability on your side, hence reason or need for selecting or observing the best WHERE (levels), Order Size on T&S, Candles etc. and using a STOP.
Extrapolate the Aggressive Bullish T&S scenario above, to the Aggressive Bearish scenario and a Neutral scenario on the T&S. ...... Did the PRICE move in the direction of your bias after the aggressive order on the large T&S ? This is the signal u need to observer on T&S.
2. Passive orders can get filled in between BID/ASK. You can drop a passive order at any price as a limit order. Passive orders do not move the price of the market, generally. They could be called neutral. Very large players can get permission to enter with PASSIVE limit/orders. As an ex-banker during FOREX auctions for foreign currency, only staff and very large corporate customers of the bank had the privilege of using the mid-rate, i.e. in between the BID/ASK. I assume it is the same here, as all banking processes are the same, they are just applied to different systems or flows of money in a capitalistic economy.
Pension Funds are some of the largest institutional players and target certain stocks. So for APPL and TLSA I would assume that the PENSION funds, MM, super large players BUFFET, BEZOS transactions are done, sometimes in blocks (i.e. by Dark Pool exchanges), in between the bid/ask so they have minimum effect on market price, or after market close in the reconciliation, showing up in the candle chart at 8:00am.
When trading APPL and TLSA a independent/retail trader will then have to watch the white transactions and observe if the price moved up or down with/after large orders on T&S. I personally and other SMB traders generally just watch the digits to the right of the decimal point for any changes on the large tape. Tickers with extremely high institutional owners also have these characteristics.
@Milos RandelovicHope the above helped. Prefer to voice chat to explain these concepts.