I wish to point out the obvious, here, and that is, that we cannot detach the idea of trade size from that of
stop/limit size…
In other words, here is an example that may seem familiar to a few traders;
assuming that the balance were the same as the equity (i.e. that there were no open/floating positions), we could
open a trade at 1% of 5k account, that is 500 GBP (or other currency); with a minimum available position of 1k,
the leverage will be 1000/500 = 2:1; with a 1k position, every 10 pips would be worth 1 GBP; so let us say that we only
had one position open, and set a limit of maximum drawdown of 10%, that would be 500 GBP, which would equate to
our position moving 500 x 10 = 5,000 pips against us!
Now, on a 500 GBP account, this would mean that we could tolerate a 500 pip move against the direction of our trade, which is still quite a wide movement (a 5% move, in currency terms): with this tolerance level, even a small account trader could participate in long-term swings and, for example, take advantage of carry trade with significant rollover interest…
However, if we, for example, quadrupled the trade size to 4k, on the 5k account, say, we would then divide the maximum drawdown limit (5,000pips or 10% of the account) by four, thus 5,000/4= 1,250 pips; for an 8k position, we would then halve this, to 1,250/2 = 625pips; and so on…
So we must always plan not only the trade size but also the maximum drawdown in terms of pips and percentage of our account, using appropriate stop/limit sizes.
Happy trading.