Here  are Dennis Gartman's 22 rules of trading.  I don't think one can be  successful in the markets just by following all of the  rules listed below.  Nevertheless, most of the rules are sensible.
 
 1.  Never, under any circumstance add to a losing position.... ever! Nothing  more need be said; to do otherwise will eventually and absolutely lead  to ruin!
 2.  Trade like a mercenary guerrilla. We must fight on the winning side and  be willing to change sides readily when one side has gained the upper  hand.
 3.  Capital comes in two varieties: Mental and that which is in your pocket  or account. Of the two types of capital, the mental is the more  important and expensive of the two. Holding to losing positions costs  measurable sums of actual capital, but it costs immeasurable sums of  mental capital.
 4. The  objective is not to buy low and sell high, but to buy high and to sell  higher. We can never know what price is "low." Nor can we know what  price is "high." Always remember that sugar once fell from $1.25/lb to 2  cent/lb and seemed "cheap" many times along the way.
 5. In  bull markets we can only be long or neutral, and in bear markets we can  only be short or neutral. That may seem self-evident; it is not, and it  is a lesson learned too late by far too many.
 6.  "Markets can remain illogical longer than you or I can remain solvent,"  according to our good friend, Dr. A. Gary Shilling. Illogic often reigns  and markets are enormously inefficient despite what the academics  believe.
 7.  Sell markets that show the greatest weakness, and buy those that show  the greatest strength. Metaphorically, when bearish, throw your rocks  into the wettest paper sack, for they break most readily. In bull  markets, we need to ride upon the strongest winds... they shall carry us  higher than shall lesser ones.
 8. Try  to trade the first day of a gap, for gaps usually indicate violent new  action. We have come to respect "gaps" in our nearly thirty years of  watching markets; when they happen (especially in stocks) they are  usually very important.
 9.  Trading runs in cycles: some good; most bad. Trade large and  aggressively when trading well; trade small and modestly when trading  poorly. In "good times," even  errors are profitable; in "bad times" even  the most well researched trades go awry. This is the nature of trading;  accept it.
 10. To  trade successfully, think like a fundamentalist; trade like a  technician. It is imperative that we understand the fundamentals driving  a trade, but also that we understand the market's technicals. When we  do, then, and only then, can we or should we, trade.
 11.  Respect "outside reversals" after extended bull or bear runs. Reversal  days on the charts signal the final exhaustion of the bullish or bearish  forces that drove the market previously. Respect them, and respect even  more "weekly" and "monthly," reversals.
 12.  Keep your technical systems simple. Complicated systems breed confusion;  simplicity breeds elegance.
 13.  Respect and embrace the very normal 50-62% retracements that take prices  back to major trends. If a trade is missed, wait patiently for the  market to retrace. Far more often than not, retracements happen... just  as we are about to give up hope that they shall not.
 14. An  understanding of mass psychology is often more important than an  understanding of economics. Markets are driven by human beings making  human errors and also making super-human insights.
 15.  Establish initial positions on strength in bull markets and on weakness  in bear markets. The first "addition" should also be added on strength  as the market shows the trend to be working. Henceforth, subsequent  additions are to be added on retracements.
 16.  Bear markets are more violent than are bull markets and so also are  their retracements.
 17. Be  patient with winning trades; be enormously impatient with losing  trades. Remember it is quite possible to make large sums  trading/investing if we are "right" only 30% of the time, as long as our  losses are small and our profits are large.
 18.  The market is the sum total of the wisdom ... and the ignorance...of all  of those who deal in it; and we dare not argue with the market's  wisdom. If we learn nothing more than this we've learned much indeed.
 19. Do  more of that which is working and less of that which is not: If a  market is strong, buy more; if a market is weak, sell more. New highs  are to be bought; new lows sold.
 20.  The hard trade is the right trade: If it is easy to sell, don't; and if  it is easy to buy, don't. Do the trade that is hard to do and that which  the crowd finds objectionable. Peter Steidelmeyer taught us this twenty  five years ago and it holds truer now than then.
 21.  There is never one cockroach! This is the "winning" new rule submitted  by our friend, Tom Powell.
 22.  All rules are meant to be broken: The trick is knowing when... and how  infrequently this rule may be invoked!