Sorry, I don't understand. I thought when you have a runner you are playing with market's money ... You are risking unrealized gains only. The trade already worked out. What am I missing?[/QUOTE
What you're not taking into account are the losing trades. You're taking LARGE loses because you have your biggest bet on the very first entry. Your "runners" are going to force you to have A HIGHER AVERAGE WINNING PCT in order to compensate for your AVERAGE GAINS not being as high as they could by going all-out.
You need to reverse your thinking. If you feel you are near the beginning of a good trend, take a standard lot position, let the market move favorably in your direction. Let it have a reaction against you. So long as that reaction stays at least X ticks away from your last position, you can take ANOTHER POSITION IN YOUR FAVOR. You will be able to do this with 2-5 add-ons in a good trend. You simply don't let the most recent add-on encroach upon (or close through) your 2nd to last position. That is controlling your leverage so it doesn't cascade against you. In fact, you expect the last reaction to, at worst, give you a breakeven on your 2nd to last position.
If the market is going to move a total of X distance from your entry point then why are you willing to take your largest loss at the very beginning? It only makes sense from a math perspective if you are going all-in / all-out. If you want to trade 3 contracts max in a trade sequence and I do too, if you enter everything upfront then your loss is 3x what mine will be if I enter 1 lot initially and then add 2 more lots on the way to the same target. I will always take a 1x loss and you will always be taking 3x that amount. And for what? You have no greater certainty of the trend working out in your favor then I do.
[I use the above as an example of adding to a trend. Most of the time I go all-in / all-out within the context of a trend]
Your whole mindset is backwards. Your approach to taking losses on initial capital in a trade sequence is the wrong way to go.
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Tharp's "Trade Your Way To Financial Freedom", page 265 - What to Avoid
"There is one kind of exit that is designed to get rid of losses, but it
totally goes against the golden rule of trading of cut your losses
short and let your profit run. Instead, it produces large losses and
small profits. This type of exit is one in which you enter the market
with multiple contracts and then scale out with various exits. For
example, you might start with 300 shares and sell 100 of them when
you can break even on all 300 shares. You might then sell another
100 shares at a $500 profit and keep the last 100 shares for a huge
profit. Short-term traders use this type of strategy frequently On a
gut level, this sort of trading makes sense because you seem to be
“insuring” your profits. But if you step back from this sort of exit
and really study it, you’ll see how dangerous this type of trading is.
What you are actually doing with this sort of exit is practicing
reverse position sizing. You are making sure that you will have
multiple positions when you take your largest losses. In our exam
ple, you’d lose on all 300 shares. You are also making sure that you
only have a minimal-sized position when you make your largest
gain-100 shares in our example. It’s the perfect method for peo
ple with a strong bias to be right, but it doesn’t optimize profits or
even guarantee profits. Does it make sense now?"