What options can you actually trade in the DEMO account?

I ma in the DEMO account and I set-up a 2 leg options trade for AMZN. Got notification "This symbol is not supported on Tiger Trade Desktop Demo Account".

I am in the DEMO account and I set-up an options trade with 3-4 legs and I am seeing the notificaiton "The Prime Account does not currently support this trade on Tiger Trade Desktop".

I am new to options and trying to understand the concepts and also how options work on tiger brokers as mine is a small account. I heard tiger brokers settles stock options in stocks and index options in cash. I just want to understand how things work. Say, I put up a trade with following legs: BUY 1x 395.00 CALL (premium = $ 26.43) SELL 2x 385.00 CALL (premium = $ 30.50) BUY 1x 375.00 CALL (premium = $36.00) At the outset, this will be a - $ 143 (-2643+3050+3050-3600). This is a small amount. My small account can afford this.  Q1: Is only 143 taken from the account or is it only settled at expiry or when trade is closed. Q2: Any other margin requirements to put the trade on? If at expiry, the price is $ 370 (below all the strikes), then all calls are worthless and you loose $ 1

$Alphabet(GOOG)$ on the weekly chart it looks like a nice pullback to the moving average.

‌$Apple(AAPL)$  ‌expecting move to upside to 170.......could move down on earnings announcement.......let's see.........

$Intel(INTC)$struggling to break 27 for a while........i expect move down after earnings and dividend news over next week......

$Intel(INTC)$probably drop another $5 in next few days and go further low after news events later this month

‌$Microsoft(MSFT)$‌Is this a possible scenario for MSFT? Drop to about 210 and bounce back from bottom of channel.

$Apple(AAPL)$besish until downtrend line break

US dollar is strong but buying power is low (inflation high). I cannot reconcile these two.

$Apple(AAPL)$looks like current level is 50% retracement of the previous low 129 and previous high 176......bullish.......

‌$Olam Group(VC2.SI)$‌Trendline break.........could go to $ 1.60......see chart attached.......

‌$SATS LTD.(S58.SI)$‌Nice pull back to the support at 50 SMA and 61.8% retracement. Could have an upside if the support holds.