last one:

11. Buy (sell) in tranches
When you decide to buy a stock or market, first decide how much you want to buy ideally, then decide what you think the pivot (buy) point should be.
Never buy the whole volume at your pivot price. If you are wrong this is very dangerous.
Buy 1/5 of you intended volume at this pivot price, then wait to see if you were right; i.e. the market or stock rises (or falls if shorting). Decide at this point how much you are prepared to lose and set a stop loss.
If you are proven correct with the first tranche, buy another 1/5 and so on until you have your intended volume (pyramiding).
Always buy at a higher price. Never buy a tranche at a lower price than the previous one.
If you always buy at a higher price you will always be in profit. Then monitor the market for normal or abnormal movements (10 above.).