我的应用程序是一家卖鱼、水族馆等的商店。我想根据销售数量得到所有商品中前10项的清单。我使用以下课程:
@MappedSuperclass
@NamedQueries({
@NamedQuery(name="getTopItems",query="SELECT x FROM FishStoreItem x ORDER BY x.salescnt DESC, x.title DESC")
})
public abstract class FishStoreItem
extends DomainSuperClass implements Se
在“//@version=4循环”代码段"for i = index_cross to 50" ( 22 -24行)中,我要查找rsi[i] < oversold值。我有"max_bars_back=50“,但是脚本一直给我指示器错误:Pine cannot determine the referencing lenght of a series. Try using max_bars_back in the study or strategy function. 1 study("error max bars back", overlay=