# Trader setting: Maximum open purchases Per trader yYou can enter that a maximum number of purchases may be made for the relevant currency. In combination with the average purchase amount, you can therefore set a precise limit on how much money you want to invest per coin. You can also use this option to instruct the trader to sell a coin "empty" without making new purchases (by entering "0"). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bitbrokertrade.com/english/untitled/explanation-functionalities/trader-setting-maximum-open-purchases.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.