Bugfix/fix issue on buy date in position detail dialog (#297)

* Fix issue on buy date

* Update changelog

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed the node engine version mismatch in `package.json`
+- Fixed an issue on the buy date in the position detail dialog
 
 ## 1.39.0 - 16.08.2021
 

apps/api/src/app/portfolio/portfolio.service.ts

@@ -337,10 +337,10 @@ export class PortfolioService {
       );
 
       const historicalDataArray: HistoricalDataItem[] = [];
-      let maxPrice = orders[0].unitPrice;
-      let minPrice = orders[0].unitPrice;
+      let maxPrice = Math.max(orders[0].unitPrice, marketPrice);
+      let minPrice = Math.min(orders[0].unitPrice, marketPrice);
 
-      if (!historicalData[aSymbol][firstBuyDate]) {
+      if (!historicalData?.[aSymbol]?.[firstBuyDate]) {
         // Add historical entry for buy date, if no historical data available
         historicalDataArray.push({
           averagePrice: orders[0].unitPrice,