Of the four original core principles of the HEA field, the highly strained lattice hypothesis remains one of the least investigated and most misunderstood. One particular problem is the lack of suitable methodologies through which this local effect in alloy systems may be probed and explored. In this work, we will discuss how the total scattering technique, wherein both the Bragg and diffuse scattering data are considered simultaneously, may be used to investigate and assess local strains in alloy systems. Key practical considerations for the successful analysis of local lattice strains using this technique will be discussed, with particular reference to sample preparation, instrumental considerations and data processing effects. Further, common errors in local-strain measurements and their mitigation will be considered, and a proposed methodology for the analysis of local strains using this technique presented and demonstrated using a case example of the exemplar HEA CrMnFeCoNi.