As far as I know, non of the online platform feature trailing stop order. I see the new CIMB platform has this function, but I have not tested it whether it works. I am scared if they accidentally sell off all my stocks. 

Most platform has SMS info if price cross certain threshold, so you can buy sell your self.

1. Yes asset only worth 1.7/share
2. NTA = Net tangible Asset, so all intangible asset like goodwill, patents etc all removed from calculation.
3. NTA is only important if there is a liquidation in which the company asset will be used to pay bond holder, creditors and finally shareholders. Companies like BAT does not have huge asset base as their business (cigarette making) does not need high investment in plant & machinery.  It is the marketing and sales which is important for this company.
4. NTA should be looked at, but not necessary for the calculation of intrinsic value.
5. It is only when a company is liquidized, NTA comes into play. Hence NTA is important only as a margin of safety.
6. In the case of BAT, NTA should not matter much unless there is some drastic changes to the business.

If you look at the calculations you will see the link between NTA and ROE.

NTA = Tangible Asset - Liabilities
Equity = Total Asset - Total Liabilities
ROE =  Earnings / Equity
PE = Price / Earnings
PNTA = Price/NTA

If you calculate out the above, you will see that ROE is very much related to NTA (except for intangibles), and it is no surprise that P/NTA is high so will the ROE.

If you want to find gems in the bush, perhaps you want to like compare PE to ROE which is a more accurate measure of company performance. But since ROE changes every year, try to take and average of 5 years, or the longer the better.

If a company is selling at low PE / average ROE, it means that they company is generating a lot of profits at very low valuation..

Remember Rate of growth (Assuming ROE is constant) =  ROE% - ( 1- (DPS-EPS)), so high dividend company does not necessary have high rate of growth if they pay out all their dividends.

In Joel Greenblatt's book, he has used this PE vs ROE formula for the past 15 years and it beat the market every single year. But his calculation is a bit more complicated as his ROE exclude taxes, amortization, interest (more or less nearly similar to FCF cash flow/equity) These does not work with utilities and financial companies.

If you are free to generate a list we can discuss further.. 

Market give valuation (stock price) primary based on the company ability to generate profit / dividend to the shareholders.

NTA/NAV is secondary issue, as it only matter when company liquidate time.

That's why we see BAT is trading at way higher than its NTA because it can generate handsome profit/dividend to shareholders.
While we see some stocks are trading at below NTA, due to profit generated is not as good or some making loss.

This ratio is not that meaningful as difference industry has different situation.
For eg.
Steel company need massive capex to produce a sale generally so it may have higher NTA than a servicing company that do not require much capex to generate the same sale level.

I check my MBA notes, and found these:

Return on Invested Capital (ROIC) = (net income + interest(1 - tax rate))/invested capital

whereby:
Invested capital = permanent capital = long term liabilities + shareholders' equity

Note that net income is the American equivalent of profit after tax, and long term liabilities are non-current liabilities.

Investopedia gives another definition for ROIC:
ROIC = (net income - dividends)/total capital

Well, I have no idea how significant ROIC is 

If you want to find gems in the bush, perhaps you want to like compare PE to ROE which is a more accurate measure of company performance. But since ROE changes every year, try to take and average of 5 years, or the longer the better.

If a company is selling at low PE / average ROE, it means that they company is generating a lot of profits at very low valuation..

Remember Rate of growth (Assuming ROE is constant) =  ROE% - ( 1- (DPS-EPS)), so high dividend company does not necessary have high rate of growth if they pay out all their dividends.

In Joel Greenblatt's book, he has used this PE vs ROE formula for the past 15 years and it beat the market every single year. But his calculation is a bit more complicated as his ROE exclude taxes, amortization, interest (more or less nearly similar to FCF cash flow/equity) These does not work with utilities 9too much capex hence low FCF) and financial companies (too much debt, hence equity skewed).

If you are free to generate a list we can discuss further.. 

It means whether that trade is entered by someone to match the bid quote or ask quote.

For example, a BUY means a guy matching the existing ask quote in queue. and vice versa

Write down of stocks is common, however if the amount is big then it is a red flag.

When you write down the stock, you need to register the amountas 'loss' in the PBT. Stock write down is required as part of auditing, usually required by auditors.

Write down of stock could be due to the following :-
1. Stock is no longer worth at same value - ie now worth lower value so write down the difference
2. Damaged stock, lost stock, expired stock, obsolete stocks - no longer sale able, hence write down the entire value
3. Product not sale able at holding price, hence need discount to clear stock - write down the difference in value to reflect new price

a. Depreciation rate set by own company, based on best financial practice and reasonable usable lifetime of item.
b. Based on the rate set by company as above. Yes equally spread throughout the years. Different items can have different rate.
c. No have to follow same percentage. Unless different item (although in a group purchase).
d. Depreciation amount is full cost of purchase (include taxes, shipping, other costs) but not inclusive of inflation/interest.
e. Yes in the PL will follow the set rate.

Typical :
Land = 0 deprecation
Building = 20-30 years
Biologicals = 16-20 years
Machinery = 8-16 years
Vehicles = 6-8 years
Electronics/Computer/furniture/others = 2-5 years
A company can define more and in much more detail.

Depreciation CAN be manipulated to show artificially low/high P&L. However auditors can and should catch this as it is common.

1. Artificially high depreciation rate = tend to lower P&L & increase free cashflow. Used to suppress/hide profit.
2. Artificially low depreciation rate = tend to increase P&L & decrease free cashflow. Used to artificially increase profit.

Of the above item 1 is a 'hidden value' mostly is very conservative company and item 2 is 'artificially boosted profit' and it is the most dangerous for obvious reasons. Average depreaciation rate can be counted via total depreciation/total fixed asset or total depreciation/cumulative capex.

Item 1 example is Lindt chocolate, who used super high depreciation since the company is super conservative (Building 5 years & machinery 2 years), hence showing very little profit. Went undetected for quite some time until noticed by an American hedge fund, since then the stock has gone through the roof...