Help with money management strategy

Dear fellow Traders,
First of all English is not my first language so I apologies up front for any grammar mistakes.
I am having problem with money management strategy at this stage of my trading development. I have already banked thousands of hours of tracing price action on my computers and I begin to see specific patterns and behavior for any given pairs.
Anyway, I have discovered certain pattern with something like 90% of success that it will move in predicted direction. My problem is that it wont last with 1:1 ratio; it will simply die out before reach TP. Currently I am trying to play with 1 lot and as soon as it goes to something of 40% of 1:1 ratio then I am closing 70% of my position, move the stop to breakeven and let that 30% go with trail stop.
It works to some degree but I wonder if you guys could perhaps point me in right direction and tell if there are better ways to handle this trading circumstance.
I began to think that success in trading depends mostly on money management techniques rather that seeing and dealing with patterns etc.
Thanks in advance

I think the answer to your issue is hard data collection. You mention a pattern that is "successful" 90% of the time.

Question #1: Is that 90% an actual data point you have from tracking that over a period of time...if so how long a period of time? Years or months? the issue here may be to find out if your pattern is a price action anomaly or a recognizable pattern that has a track record over several years.

Question #2: You use the word "successful"...what does that mean? In the same sentence you also mention that the stop for this trade is greater than 1:1...does that mean that this entry goes only a certain distance (in pips) then turns back? It is unclear to me what you mean by the word "successful". Perhaps you can use a smaller stop? If not perhaps you can wait for this trade to finish then go the other way trading it to where your stop would be? Again you will need data to find out how often that occurs.

Question #3: If you're signal goes to 1:1 only 40% of the time, that implies that the other 60% of the time the signal reverses on you...wouldn't you be better served to trade this the other way? The reverse of what you are trading now?

Again not knowing your pattern, or knowing if or how you have collected any data on this pattern it is difficult to give anything other than just general advice...

For me it seems you may have something worth persueing IF you know what you're dealing with. I would divide the projects into these priorities:

Priority #1: Definitions - how do you define a "successful" trade entry? How many pips are you looking to capture with this pattern?

Priority #2: Data - How reliable is your data and does it capture a reasonable data sample from the market. By this I mean, if this pattern emerges once per day, two time per day, etc. How many times does it: (a) go in the anticipated direction? (b) go only a short distance in the anticipated direction then reverse? (c) signal a continuation or reversal of trend? (d) signal a range?

Priority #3: Planning - Once you have answers to the above questions and any more you can think of then you are in a position to start making a trade plan that would include risk management and contingencies for unanticipated moves.

All you have given so far is a vague idea that you are trying to utilize before you know (or have presented) all the facts.