I see a lot of people talking about when to sell; but I think that buying is as important if not more (obviously you but low -_-). so do you guys aim to buy the lowest low of the day/week/month/... and do you think that is riskier and/or hard to predict. do you wait for price reversals? do you follow expert advice?? please share your thoughts and your stories (successful or otherwise 
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Depends on the situation, a 7-14 day lowest would be a good time to buy but try to check if its already over sold, check the reason why the price is dropping. if you plan to buy today because its the red days and price continue to drop, I suggest to wait for a little longer as hard fork is around the corner and price will continue to drop.)I agree. I think the operative word their is "lowest". You have to gauge the coin or asset your buying and see if its value is enough for you, in relation to your capital, to be bought. Some people only consider the value of the coin, but what they are failing to see is how much they can get, especially if the capital to be used is only small. In this market, sometimes having more of some asset is better because it has more chances of increasing value as support to those highly priced coins that may gain, but it would only give you little profit. Following the principle of "buy low, sell high", the best time would always be when the asset is at its lowest value; however, you must also follow its trend of depreciation because, if you jump the gun and buy at one point, but there is still a chance for it to drop, might as well wait.