here's a suggestion. post one or two free signals every day, it would be much more effective if you added an image/SS with a short explanation.
You can add the donation address below or in your signature so, that those who like what you do can send you a tip. that way, no one will be able to say that they were cheated, and you have the possibility to get some money for yourluck knowledge. 
You can add the donation address below or in your signature so, that those who like what you do can send you a tip. that way, no one will be able to say that they were cheated, and you have the possibility to get some money for your
Now that's a great suggestion! Trade for yourself and explain what you are doing to the forum audience. If you can show a good track record, surely some users are willing to donate a good amount for good quality content.
And there is another advantage: if you are consistently right with your trades, you will soon no longer need to rely on donations or sales. If you know how to beat the market, you don't need to sell anything to others. You know?